Your question is hard to prove, if not impossible. Here is a site that will give you a list of oldest buildings, and the date they were built.
* http://en.wikipedia.org/wiki/List_of_old_Canadian_buildings
A building called the "old fort" is the oldest building in the state of Montana. The "old fort" is located in Fort Benton and it is considered a national landmark.
The oldest man made building is the 4,600 year old tomb of King Zoser, in Sakkara, Egypt.
old fort
34
the oldest maple tree is in Canada and is called comfort tree. it is 500 years old.
500,000 years old. By:Nicolas Li
Old state house boston
the oldest Canadian is 119 years old and died 11 years ago! 1812 a very very very rare coin that is the oldest coin in Canada
The oldest public building in Washington, D.C. is the, Old Stone House. The house was built in 1765 and open to public since 1960.
The oldest building in Rome is believed to be the Palatine Hill, which dates back to the 8th century BC. This area was the center of ancient Roman civilization and is considered one of the oldest parts of the city.
Halifax is the capital of Nova Scotia.
Hill hall at the university of wyoming. i know a guy there and that's what he said Hill Hall was built after the turn of the century, Old Main is the oldest building at the University of Wyoming being built in the 1890's. As far as the oldest building in Wyoming goes it is the Old Bedlam at Fort Laramie which was built in 1849.