6th century BC in architecture - 7th century BC in architecture - 8th century BC in architecture - 9th century BC in architecture - 10th century BC in architecture 2nd Millennium BC 11th century BC in architecture - 12th century BC in architecture - 13th century BC in architecture - 14th century BC in architecture - 15th century BC in architecture 16th century BC in architecture - 17th century BC in architecture - 18th century BC in architecture - 19th century BC in architecture - 20th century BC in architecture 3rd Millennium BC 21st century BC in architecture - 22nd century BC in architecture - 23rd century BC in architecture - 24th century BC in architecture - 25th century BC in architecture 26th century BC in architecture - 27th century BC in architecture - 28th century BC in architecture - 29th century BC in architecture - 30th century BC in architecture Neolithic 4th millennium BC in architecture See also Timeline of architecture Notes Tables of years