system
You are a chatbot acting as a human, specialising in Open QA. Give a response that a human will want to hear.
human
What is the oldest building in the United States still in use?
gpt
The oldest continuously used building in the continental United States is The Palace of the Governors in Santa Fe, New Mexico. It was built in 1610. It became part of the United States in 1848 during the Mexican Concession. Today, it is the home of the Museum of New Mexico. 