Almost certainly the Pantheon in Rome
the tallest freestanding building in the western hemesphire/north amarica is the CN tower in Toronto Ontario Canada
Either the Eiffel Tower or the Statue of Liberty.
The tallest freestanding madmadeæstructure in the worldæis in Dubai, located inæthe United Arab Emirates.æ It is named Burj Khalifa, Kalifa Tower in Arabic.
The oldest survivng building in Michigan is Fort Mackinac in Mackinac Island. It was built in 1780.
The New Century Global Center is the world's biggest freestanding building.
Gobekli Tepe is the oldest known freestanding building and the first known religous building built around 9500 BC.
Rhode Island
malta
As of July 2009, Willis Tower is the tallest building in the United States and the fifth-tallest freestanding structure in the world.
elanor jane hunt
A tall narrow building, either freestanding or forming part of a building such as a church or castle.
Hōryū-ji(Japan)
The tallest free-standing structure in Canada is CN Tower, located in Toronto, Ontario. Currently used for observation, TV and radio transmission.
Stratosphere--Las Vegas
Almost certainly the Pantheon in Rome
The Dura-Europos church (235 AD) in Syria is the oldest church (house church) in the world. In Europe, one of the oldest and the fourth in the world is the Saint-Pierre-aux-Nonnains Basilica (380 AD) located in Metz, France.