Most of the very oldest buildings are made of stone, as you can see from this survey:
Göbekli Tepe is an ancient site in Turkey, built around 9600 BC featuring stone pillars with detailed carvings.
The Pyramid of Djoser in Saqqara, Egypt, was built in the 27th century BC. It is widely regarded as the world’s first colossal stone building.
The Van Fortress in Turkey dates back to the 8th century BC and it was occupied by various groups including Medes, Achaemenids, Armenians, Parthians, Romans, Sassanid Persians, Byzantines, Arabs, Seljuks, Safavids, Afsharids, Ottomans, and Russians.
Nuraghe Santu Antine in Sardinia was built in 1600 BC. Surrounding the central tower are three smaller towers, connected by large walls.
La Fortaleza in Puerto Rico is the oldest continuously used executive mansion in the New World, with several connected buildings, sheltered gardens and a swimming pool.
The Great Pyramid of Giza was built approximately 4,600 years ago, and is the oldest of the Seven Wonders of the Ancient World.
The Tower of Hercules, constructed in the 1st century in Spain stands as the oldest lighthouse that remains erect.
The Konark Sun Temple in India dates back to the 13th century and was originally standing at over 200 feet. It now resembles a stone chariot with intricate carvings.
St. George’s Basilica, built in 920, is the oldest church building in Prague and holds historical and spiritual importance as part of Czech state’s spiritual center.
The McIntire Garrison House in York, Maine was built around 1707 for protection against Native American attacks.
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