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Constructed in the 6th century, the Hagia Sophia showcases the brilliance of ancient Byzantine architecture. Its massive dome, which features 40 openings that flood the interior with light, is a testament to its builders' innovative spirit. Despite being located on one of the world’s most active seismic faults, the Hagia Sophia has withstood numerous earthquakes, sparking curiosity among researchers regarding the architectural secrets that bolster its endurance.