Monuments

Notre-Dame: Churches Dedicated to the Virgin Mary, with a Focus on Notre-Dame de Paris Notre Dame Notre-Dame (French for 'Our Lady') denotes churches dedicated to the Virgin Mary. Article covers the name's origins, architectural types, notable examples—especially Notre-Dame de…

Notre-Dame de Paris Medieval Catholic cathedral on Île de la Cité in Paris, a masterpiece of French Gothic architecture, famed for its façade, rose windows, cultural role and extensive restoration aft…

Notre-Dame de Reims Gothic cathedral in Reims, France, famed for royal coronations, rich sculptural decoration and stained glass. A UNESCO World Heritage site and a major example of High Gothic archit…

Notre-Dame de Saint-Omer (Saint-Omer Cathedral) Notre-Dame de Saint-Omer Historic church in Saint-Omer, France — a former cathedral with Gothic fabric dating from the 13th–16th centuries, notable for its organ, woodwork and survival through the French R…

Nottoway Plantation House, White Castle, Louisiana Nottoway Plantation Antebellum plantation house built in 1859 near White Castle, Louisiana. Notable for its grand Greek Revival-Italianate architecture, association with the sugar economy and enslaved…

Obelisk: form, history, and cultural significance Obelisk An obelisk is a tapering four-sided stone monument with a pyramidal top, developed in ancient Egypt and later adapted around the world as a commemorative and architectural symbol.

Odawara Castle — history, architecture and visitor guide Odawara Castle Odawara Castle in Kanagawa is a reconstructed Japanese castle and museum, known for its role in medieval warfare, park grounds, cherry blossoms and exhibits on local samurai histor…

Offa's Dyke — early medieval earthwork along the England–Wales border Offa's Dyke Offa's Dyke is a large early medieval linear earthwork that roughly traces the England–Wales frontier. Its attribution to King Offa, date and original function remain subjects of a…

Okayama Castle — the 'Crow Castle' of Okayama Okayama Castle Historic Japanese castle in Okayama City, nicknamed 'Crow Castle' for its black exterior. Located beside Korakuen Garden, rebuilt after WWII and today serves as a museum and landma…

Old Melbourne Gaol — history, design, notable events and museum Old Melbourne Gaol 19th-century bluestone prison in central Melbourne, Victoria, notable for its Pentonville-inspired layout and high-profile executions, including Ned Kelly (1880). Closed 1929; now…

Old North Church (Christ Church in the City of Boston) Old North Church Christ Church, commonly called the Old North Church, is an 18th-century Episcopal parish in Boston famed for its Revolutionary War lantern signal, historic architecture, burials, a…

Old St Paul’s Cathedral — the medieval cathedral of the City of London Old St Paul's Cathedral Medieval St Paul’s was the large Gothic cathedral on the site of today’s St Paul’s in the City of London, begun after the 1087 fire, completed c.1314, and destroyed in the Great Fi…

Old Synagogue (Erfurt) — medieval Jewish site and museum Old Synagogue (Erfurt) The Old Synagogue in Erfurt, Germany, is one of Europe's best preserved medieval synagogues (oldest parts c. 11th century). It now houses a museum with the Erfurt Treasure and hist…

One World Trade Center: overview, design, history and significance One World Trade Center One World Trade Center is the principal tower of New York City's rebuilt World Trade Center complex. A symbolic and functioning skyscraper, it combines office space, an observatory…

Operation Boatswain Memorial — Mount Herzl, Jerusalem Operation Boatswain Memorial Memorial at Mount Herzl commemorating 23 Palmach fighters and a British observer lost at sea in 1941 during Operation Boatswain, their failed sabotage of Tripoli oil facilities and…

Oriental Pearl Tower A landmark radio and television tower in Shanghai's Pudong district, known for its distinctive spheres, observation decks, and role in broadcasting and tourism. Height: 468 m; comp…

Orlov diamond A large, rose‑cut diamond of Indian origin that became part of Russia's imperial regalia and is now held in the Moscow Kremlin Diamond Fund.

Osaka Castle: history, architecture, and cultural significance Osaka Castle A concise encyclopedia entry on Osaka Castle: its origins under Toyotomi Hideyoshi, architectural features, major restorations, role in Japanese history, and modern use as a museum…

Osborne House: Victorian Royal Residence on the Isle of Wight Osborne House Osborne House, an Italianate seaside palazzo on the Isle of Wight, was the family home of Queen Victoria and Prince Albert, later used for military and public purposes and now pres…

Osborne's Bull: Spain's Iconic Roadside Silhouette Osborne's bull A concise account of Osborne's Bull — its origin as a 1956 advertisement, physical design, cultural adoption as a Spanish emblem, and the debates over its status and preservation.

Our Lady of Meritxell Patron saint and national symbol of Andorra: a medieval Marian statue, destroyed in 1972 and commemorated today by a mid-1970s replica and modern sanctuary.

Palace of Caserta (Reggia di Caserta) Palace of Caserta Eighteenth‑century Bourbon royal palace near Naples, Italy. Designed by Luigi Vanvitelli, it has about 1,200 rooms, vast formal gardens and hydraulic works, and was inscribed as a…

Palace of Versailles (Château de Versailles) Palace of Versailles A monumental 17th‑ and 18th‑century royal palace near Paris, transformed under Louis XIV into a centre of courtly government, art and gardens; now a museum, site of historic treati…

Palace of Whitehall Former principal residence of English monarchs in London (c.1530–1698); once the largest palace in Europe. Most buildings were lost to fire; the Banqueting House survives and White…

Palaestra at Olympia: architecture, use, and historical context Palaestra at Olympia The palaestra at Olympia is the ruined ancient training building where Greek wrestlers and other athletes trained; notable for its square plan, Doric colonnades, and 3rd‑century BC…

Palais Bourbon Palais Bourbon is an 18th‑century palace on the left bank of the Seine in Paris that serves as the seat of the French National Assembly. It combines hôtel particulier origins with…

Palazzo Carignano Baroque palace in Turin, Italy, noted for its undulating rounded façade. Former seat of parliamentary assemblies, birthplace of Vittorio Emanuele II, and home to the National Museu…

Panteón Francés de la Piedad (Mexico City) Panteón Francés Historic cemetery in southern Mexico City notable for European-style funerary art, ornate mausoleums and the graves of several prominent figures; distinct from another Panteón Fran…

Pantheon (Rome): ancient temple, dome, and architectural legacy Pantheon The Pantheon in Rome is a remarkably preserved ancient temple rebuilt under Hadrian, famed for its unreinforced concrete dome, oculus, continuous use, and wide influence on Western…

Papahānaumokuākea Marine National Monument A vast protected area in the northwestern Hawaiian Islands; Papahānaumokuākea protects remote coral reefs, atolls, seabird colonies and endemic marine life across roughly 140,000 s…

Parthenon: Ancient Temple on the Athenian Acropolis Parthenon The Parthenon is the 5th-century BC temple on the Acropolis of Athens, dedicated to Athena; celebrated for its Doric design, sculptural program, and long history of reuse, damage a…

Pashupatinath Temple — Sacred Shiva Shrine in Kathmandu, Nepal Pashupatinath Temple Major Hindu temple complex in Kathmandu devoted to Lord Shiva; a cultural and religious center for worship, rituals, and cremation rites, central to Nepalese heritage.

Passage tomb (passage grave) Passage tomb A passage tomb is a prehistoric burial monument with a narrow entrance passage leading to a chamber, built of large stones and earth, found across Europe with notable concentration…

Pentre Ifan: Neolithic Dolmen of Pembrokeshire Pentre Ifan Pentre Ifan is a prominent Neolithic portal dolmen near Nevern in Pembrokeshire, Wales, noted for its massive capstone and high state of preservation; it is an important prehistori…

Persepolis — Ceremonial Capital of the Achaemenid Empire Persepolis Persepolis (Parsa, Takht‑e Jamshid) was the ceremonial capital of the Achaemenid Empire, famed for its monumental terraces, palaces, reliefs and inscriptions that document imperial…

Petronas Towers Twin skyscrapers in Kuala Lumpur, Malaysia, completed in 1998. Designed by César Pelli, they were the world’s tallest buildings until 2004 and remain the tallest twin towers, noted…

Peyrepertuse Castle — perched Cathar fortress in Aude, Occitanie Peyrepertuse Castle Peyrepertuse Castle, a ruined medieval fortress in Aude, Occitanie, France, is one of the famed Cathar castles. Perched on a limestone ridge, it combines Roman-era occupation, medi…

Pickford's House Museum — Georgian house and costume museum in Derby Pickford's House Museum 18th‑century town house by architect Joseph Pickford, preserved as a museum of Georgian domestic life and costume in Derby. Shows period rooms, costume displays and local architect…

Plaza Mayor (Madrid) Plaza Mayor of Madrid Historic central square in Madrid, originating as a medieval market and reshaped in the 16th–17th centuries; notable for its arcaded façades, Casa de la Panadería and an equestrian…

Poblet Monastery — Royal Abbey of Santa Maria de Poblet Poblet Monastery A major Cistercian abbey in Catalonia founded in 1150. Poblet served as a royal pantheon for the Crown of Aragon and is notable for its Gothic architecture, history, and UNESCO rec…

Poets' Corner at Westminster Abbey: Commemoration of British Writers Poets' Corner Poets' Corner at Westminster Abbey: history of commemorations, burials and memorials honoring British poets, playwrights and writers, plus selection practices and modern additions

Pont du Gard: Roman aqueduct bridge in southern France Pont du Gard Pont du Gard is a well-preserved Roman aqueduct bridge near Vers-Pont-du-Gard that carried water to Nîmes. Built in the 1st century, its three tiers of arches reach 49 m and it is…

Poughkeepsie Bridge (Walkway Over the Hudson) Poughkeepsie Bridge A historic late-19th-century cantilever railroad bridge across the Hudson River, converted into the Walkway Over the Hudson State Historic Park and reopened for pedestrians in 2009…

Powersite Dam (Forsyth, Missouri) Powersite Dam A concrete buttress hydroelectric dam completed in 1913 on the White River at Forsyth, Missouri, forming Lake Taneycomo; designed by Nils F. Ambursen and still operated by a privat…

Prytaneion (Olympia): Civic Hearth and Feasting Hall of Ancient Greece Prytaneion The Prytaneion at Olympia contained the sacred hearth of Hestia, hosted feasts for Olympic victors and official guests, and was rebuilt in Roman times. It stood near the Temple of…

Puerta de Alcalá — neoclassical monument in Madrid Puerta de Alcalá Puerta de Alcalá is an 18th‑century neoclassical gate in Madrid's Plaza de la Independencia, commissioned by King Carlos III. Noted for its five arches, sculptural groups and its r…

Puthia Temple Complex Historic cluster of Hindu temples in Puthia Upazila, Rajshahi Division, Bangladesh, renowned for terracotta decoration, varied Bengali temple forms, and the country's largest conce…

Pyramid: forms, history, and cultural significance Pyramid A pyramid is a tapered geometric structure found worldwide. This article explains types, parts, historical development, uses, and notable examples from ancient Egypt to Mesoamerica…