The New Mexico State Capitol, located in Santa Fe at 490 Old Santa Fe Trail, is the house of government of the U.S. state of New Mexico. It is the only round state capitol in the United States, and is known informally as "the Roundhouse".

Answer this question based on the passage: what is the state capital of new mexico? Let's have some stream of consciousness first.
To answer the above question, the relevant sentence is: The New Mexico State Capitol, located in Santa Fe at 490 Old Santa Fe Trail, is the house of government of the U.S. state of New Mexico. So, the answer is the house of government of the U.S. state of New Mexico.