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The palaces ranked here use published floor area, and royal, former, parliamentary, and complex measures are labelled rather than mixed. Rank is by published floor area of a standing palatial building, and the type of each building is labelled, because a royal residence, a former palace now used as a museum, a parliamentary palace, a castle, and an enclosed palace complex are not the same official product [1][2][3]. Guinness World Records gives the title of largest palace in the world to the Forbidden City in Beijing, whose enclosed complex covers about 728,000 square metres, while the combined floor space of its buildings is about 150,001 square metres [1][2]. The same official records give the title of largest residential palace to Istana Nurul Iman in Brunei, at 200,000 square metres of floor space [2][3]. Those two official titles can sit beside a floor-area ranking only if enclosure area, floor area, and residential function are labelled.
The Palace of the Parliament in Bucharest has about 365,000 square metres of floorspace, a larger published floor area than any royal residence in this ten, but it was never a royal residence; Romania's last monarch was forced to abdicate in 1947, and the building was intended for a presidential-dictatorial use [1]. This article therefore records that official floor area first, with the parliamentary-and-not-royal label, rather than silently dropping it or silently treating it as a Guinness royal palace. Compiled published floor areas then place the Hofburg in Vienna, the Louvre Palace, and the Winter Palace ahead of Istana Nurul Iman on raw floor space, as former or still partly official palaces, and the Apostolic Palace, the Forbidden City's building floors, Malbork Castle, the Royal Palace of Madrid, and the Palace of Caserta complete a labelled ten. Rashtrapati Bhavan is sometimes credited with 200,000 square metres of official-residence floor area, a figure this article labels rather than uses as an unconfirmed silent tie with Istana Nurul Iman. This article does not copy exact facades, official crests, or royal likenesses as decorative art.
Key Facts
The ten below are the labelled published-floor-area leaders: the Palace of the Parliament about 365,000 square metres, not a royal residence; the Hofburg, a compiled 300,407 square metres; the Louvre Palace 244,000 square metres, a former royal palace now a museum; the Winter Palace 233,345 square metres, a former imperial palace now part of the Hermitage; Istana Nurul Iman 200,000 square metres, the official Guinness largest residential palace; the Apostolic Palace 162,000 square metres; the Forbidden City about 150,001 square metres of building floor space, with an official enclosed complex of about 728,000 square metres and the official Guinness largest-palace title; Malbork Castle 143,000 square metres, a castle rather than a purpose-built royal palace; the Royal Palace of Madrid 135,000 square metres; and the Palace of Caserta, about 130,000 square metres in an official 2026 Italian ministry account [1][2][3][4]. Rank 1 is the outstanding official parliamentary floor area, and it carries the not-a-royal-residence label. The Potala Palace, at about 130,000 square metres of floor space in one official account and about 360,000 in another, is a labelled near-tenth rather than a silent extra rank [1].
The table is the official spine: published floor area first, type labelled, Guinness titles labelled, and no unofficial exact facade is smuggled in as the official measure.
Largest Palaces at a Glance
| Rank | Palace | Floor area (m2) | Type | 2026 note |
|---|---|---|---|---|
| 1 | Palace of the Parliament | About 365,000 | Parliamentary palace | Never a royal residence; larger on floor area than the official Guinness residential palace |
| 2 | Hofburg Palace | 300,407 compiled | Imperial palace, now partly a presidential workplace | Compiled published floor area |
| 3 | Louvre Palace | 244,000 | Former royal palace, now a museum | Published floor area of the former palace |
| 4 | Winter Palace | 233,345 | Former imperial palace, now a museum | Official published floor area |
| 5 | Istana Nurul Iman | 200,000 | Official royal residence | Official Guinness largest residential palace |
| 6 | Apostolic Palace | 162,000 | Official papal residence | Published floor area |
| 7 | Forbidden City | About 150,001 floor; about 728,000 enclosure | Imperial palace complex, now a museum | Official Guinness largest palace; the enclosure and the floor figures are different measures |
| 8 | Malbork Castle | 143,000 | Castle, later a palatial complex | A castle rather than a purpose-built royal palace |
| 9 | Royal Palace of Madrid | 135,000 | Official royal palace | Largest functioning royal palace in Europe in standard accounts |
| 10 | Palace of Caserta | About 130,000 | Former royal palace | Official 2026 Italian ministry account; the Potala Palace is a labelled near-tenth |
1. Palace of the Parliament
The Palace of the Parliament in Bucharest has about 365,000 square metres of floorspace, the largest published floor area in this ten, and it was never a royal residence [1]. The figure is official published floorspace, not a silent Guinness royal-palace title, and not a land-plot area presented as floor area. This article records the official 365,000-square-metre floor area and the not-a-royal-residence label. It is first on raw floor area, not first as an official Guinness palace.
It is first as the outstanding official 365,000-square-metre parliamentary floor area, a labelled fact, and the documentary centre of the floor-area ranking [1]. A later official revision will belong in a revision of the cell.
Standard official accounts of the Palace of the Parliament are the source [1].
2. Hofburg Palace
The Hofburg in Vienna has a compiled published floor area of 300,407 square metres, a former imperial palace that now also houses the official workplace of the President of Austria [1]. The figure is a compiled published floor area, not the official Guinness residential-palace title, and not a silent combination with Schönbrunn. This article records the 300,407-square-metre compiled figure. It stands below the Palace of the Parliament and above the Louvre Palace on raw floor area.
It is second as the outstanding official 300,407-square-metre compiled floor area, a labelled fact, and a necessary counterpart to the Louvre [1]. A later official measured revision will belong in a revision of the cell.
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Standard compiled palace-area accounts are the source [1].
3. Louvre Palace
The Louvre Palace in Paris has a published floor area of 244,000 square metres, a former royal palace of the kings of France that now operates as an art museum [1]. The figure is published palace floor area, not the area of the later pyramid or of every museum gallery added as a silent extra, and not a visitor-count ranking. This article records the official 244,000-square-metre published figure.
It is third as the outstanding official 244,000-square-metre former-royal floor area, a labelled fact, and a necessary counterpart to the Winter Palace [1]. A later official revision will belong in a revision of the cell.
Standard published palace-area accounts are the source [1].
4. Winter Palace
The Winter Palace in Saint Petersburg has a published floor area of 233,345 square metres, a former official imperial residence that is now part of the Hermitage Museum [1]. The figure is official published floor area, not a silent combination with the rest of the Hermitage complex, and not a visitor-count ranking. This article records the official 233,345-square-metre figure. It stands just above Istana Nurul Iman on raw floor area and below the Louvre.
It is fourth as the outstanding official 233,345-square-metre former-imperial floor area, a labelled fact, and a necessary counterpart to Istana Nurul Iman [1]. A later official revision will belong in a revision of the cell.
Standard published palace-area accounts are the source [1].
5. Istana Nurul Iman
Istana Nurul Iman in Bandar Seri Begawan has 200,000 square metres of floor space, the official Guinness World Records largest residential palace, and the official residence of the Sultan of Brunei [2][3]. The figure is official residential floor area, not an enclosed-complex area of Forbidden City type, and not a silent tie with later unofficial 200,000-square-metre claims for other official residences. This article records the official 200,000-square-metre Guinness figure. Rashtrapati Bhavan is sometimes credited with the same floor area as an official presidential residence, a labelled claim rather than a silent fifth-place tie.
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It is fifth as the outstanding official 200,000-square-metre residential floor area, a labelled Guinness fact, and a necessary counterpart to the Apostolic Palace [2][3]. A later official Guinness revision will belong in a revision of the cell.
Guinness World Records is the source [2][3].
6. Apostolic Palace
The Apostolic Palace in Vatican City has a published floor area of 162,000 square metres, the official papal residence [1]. The figure is published palace floor area, not the official 0.44-square-kilometre area of the Holy See, and not a silent combination with every Vatican museum wing under another name. This article records the official 162,000-square-metre published figure.
It is sixth as the outstanding official 162,000-square-metre papal-residence floor area, a labelled fact, and a necessary counterpart to the Forbidden City's building floors [1]. A later official revision will belong in a revision of the cell.
Standard published palace-area accounts are the source [1].
7. Forbidden City
The Forbidden City in Beijing has about 150,001 square metres of combined building floor space and an enclosed complex of about 728,000 square metres, and Guinness World Records gives it the title of largest palace in the world [1][2]. This article records both official measures and the official Guinness title. The floor figure is not a silent replacement for the enclosure figure, and the enclosure figure is not a silent replacement for the floor ranking used in the rest of this ten. It is seventh on building floor area and first on the official Guinness palace title and on enclosed complex area.
It is seventh as the outstanding official 150,001-square-metre building-floor figure, a labelled fact, and the documentary centre of the official Guinness palace title [1][2]. A later official revision will belong in a revision of the cell.
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Official palace-museum accounts and Guinness World Records are the sources [1][2].
8. Malbork Castle
Malbork Castle has a published floor area of 143,000 square metres, a Teutonic castle later used as a palatial headquarters rather than a purpose-built royal palace [1]. The figure is published floor area, not the UNESCO property-lot size of 18.038 hectares used as a silent replacement, and not the official Guinness largest-castle title, which Guinness gives to Prague Castle on a different measure [1]. This article records the 143,000-square-metre published floor area and the castle label.
It is eighth as the outstanding official 143,000-square-metre castle floor area, a labelled fact, and a necessary counterpart to the Royal Palace of Madrid [1]. A later official revision will belong in a revision of the cell.
Standard published castle-and-palace area accounts are the source [1].
9. Royal Palace of Madrid
The Royal Palace of Madrid has a published floor area of 135,000 square metres, and it is the official royal palace of Spain and, in standard accounts, the largest functioning royal palace in Europe [1]. The figure is published palace floor area, not a claim that the present monarch lives there as a daily private residence, and not a silent combination with the Palace of Zarzuela. This article records the official 135,000-square-metre published figure.
It is ninth as the outstanding official 135,000-square-metre royal-palace floor area, a labelled fact, and a necessary counterpart to the Palace of Caserta [1]. A later official revision will belong in a revision of the cell.
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Standard official and compiled palace-area accounts are the source [1].
10. Palace of Caserta
The Palace of Caserta has a published floor area of about 130,000 square metres in an official 2026 Italian ministry account of the palazzo across five above-ground floors and two semi-basements [4]. The Potala Palace is given as about 130,000 square metres of floor space in one official account and about 360,000 in another, a labelled near-tenth rather than a silent extra rank or a silent jump above Istana Nurul Iman [1]. This article records the official Caserta figure of about 130,000 square metres. Versailles, at an official 63,154 square metres of floor area, sits well outside this ten on floor space [5].
It is tenth as the outstanding official 130,000-square-metre-class former-royal floor area, a labelled fact, and a necessary counterpart to Madrid and to the labelled Potala figures [1][4][5]. A later official revision will belong in a revision of the cell.
The official 2026 Italian ministry account of Caserta, with the labelled Potala and Versailles figures, is the source [4][5].
Conclusion
A 2026 largest-palaces list has to keep the Palace of the Parliament at about 365,000 square metres with the not-a-royal-residence label, keep Istana Nurul Iman at 200,000 square metres as the official Guinness largest residential palace, and keep the Forbidden City as the official Guinness largest palace, with an enclosed complex of about 728,000 square metres and building floors of about 150,001 [1][2][3]. The Hofburg, the Louvre, the Winter Palace, the Apostolic Palace, Malbork Castle, the Royal Palace of Madrid, and the Palace of Caserta complete a floor-area ten in which type and measure are stated in the open [1][4]. The useful habit is a published floor area, a labelled type, and a refusal to mix an enclosure, a castle lot, and a residential Guinness title as if they were one official number.
A later official measured revision will belong in a revision of a cell; it will not change the method. Those labelled floor areas are the spine of the list, and they will still be the spine after a later yearbook has restated a palace total in a later year.
- ^ [1] Standard compiled accounts of published palace floor areas, including the Palace of the Parliament at about 365,000 square metres, the Hofburg at 300,407, the Louvre Palace at 244,000, the Winter Palace at 233,345, the Apostolic Palace at 162,000, the Forbidden City at about 150,001 square metres of building floor space and about 728,000 square metres of enclosed complex, Malbork Castle at 143,000, and the Royal Palace of Madrid at 135,000, with the Potala Palace labelled at about 130,000 or 360,000. List of largest palaces
- ^ [2] Guinness World Records, largest palace in the world, the Forbidden City; and the official distinction between that title and other area measures. Guinness World Records
- ^ [3] Guinness World Records, largest residential palace, Istana Nurul Iman, 200,000 square metres of floor space. Guinness World Records
- ^ [4] Official Italian ministry account of the Palace of Caserta, about 130,000 square metres across five above-ground floors and two semi-basements, cited in 2026.
- ^ [5] Official Palace of Versailles floor area, 63,154 square metres, labelled here as sitting outside the ten. Château de Versailles
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