World Landmarks — Expert Quiz

An expert-level quiz on world landmarks: Hagia Sophia, the Parthenon, Machu Picchu, Stonehenge, and architectural detail only true enthusiasts know. 10 questions.

1. What structural innovation did Hagia Sophia (537 CE) introduce that allowed its massive dome to float above a ring of windows?
   Answer: The pendentive
   Hagia Sophia's architects used pendentives — curved triangular masonry sections that transition between a square base and a circular dome — allowing the enormous dome to rest on four piers rather than solid walls.
2. In which year was the Eiffel Tower completed, and for what occasion?
   Answer: 1889, for the Paris World's Fair
   The Eiffel Tower was completed in 1889 for the Exposition Universelle, marking the centennial of the French Revolution. Gustave Eiffel's iron lattice tower was originally controversial but was saved by its use as a radio transmission tower.
3. The Parthenon's architects introduced deliberate visual corrections to fight optical distortion. What is the term for the subtle swelling of columns that counteracts the appearance of concavity?
   Answer: Entasis
   Entasis is the subtle convex swelling of a column's profile — it was used on Parthenon columns to prevent them from appearing to bow inward, an optical illusion that would occur with perfectly straight-sided columns.
4. Mont Saint-Michel sits on a tidal island off the Normandy coast. What is the approximate tidal range there, and what happens at high tide?
   Answer: About 14 metres — one of Europe's highest tidal ranges, making it a true island
   The tidal range at Mont Saint-Michel reaches approximately 14 metres — among the largest in Europe — completely surrounding the island at high tide and creating kilometres of exposed sand flats at low tide. It is a truly tidal island.
5. The Taj Mahal's four minarets are said to lean slightly outward from the central tomb. What is the historical explanation for this design choice?
   Answer: To fall away from the tomb rather than onto it if toppled by an earthquake
   The Taj Mahal's minarets intentionally lean slightly outward — designed so that if an earthquake or other disaster caused them to collapse, they would fall away from the precious central tomb rather than damage it.
6. What construction technique did the Inca use at Machu Picchu that makes the structures resistant to Andean earthquakes?
   Answer: Ashlar dry-stone masonry with no mortar and fitted joints
   Inca builders at Machu Picchu used ashlar masonry — precisely cut stones fitted together without mortar, with interlocking irregular shapes. During earthquakes, the stones flex and resettle rather than cracking, making the structures exceptionally durable.
7. The Colosseum's velarium was an engineering marvel of Roman ingenuity. What was it?
   Answer: A retractable canvas awning stretched over the audience to provide shade
   The velarium was a retractable canvas awning — a vast canopy that sailors from the Misenum naval fleet operated using ropes and pulleys from the upper rim of the Colosseum, shading up to 80,000 spectators from the Roman sun.
8. Which building's glass-roofed atrium is recognised as Europe's largest covered public square, designed by Norman Foster?
   Answer: The British Museum Great Court, London
   Norman Foster's Great Court at the British Museum (2000) features a 6,100 square metre glass-and-steel roof — the largest covered public square in Europe — wrapping the cylindrical Reading Room in a spectacular geometric grid.
9. The Sagrada Família in Barcelona has been under construction since 1882. When was it projected to reach completion?
   Answer: 2026 — the centenary of Gaudí's death
   Construction of the Sagrada Família was projected to complete around 2026, marking the centenary of Antoni Gaudí's death in a tramway accident in 1926 — though COVID-19 delays pushed some elements beyond that target date.
10. Stonehenge is precisely aligned with which astronomical event, observable over the Heel Stone at dawn?
    Answer: Summer solstice sunrise
    At the summer solstice (around 21 June), the sun rises directly over the Heel Stone and shines along the main axis of Stonehenge into the centre of the monument — an alignment almost certainly intentional, built around 2500 BCE.