Question

world's oldest building

Answer 1

Barnenez,France,first built in 4850 BC .
Located in northern Finistère and partially restored. According to André Malraux it would have been better named ‘The Prehistoric Parthenon’. The structure is 72 m long, 25 m wide and over 8 m high.

Answer 2

The world's oldest building is Barnenez  in France.It was built on around 4850 BC.