
The Anza House, or the Casa Juan de Anza, is one of the oldest buildings in the Third Street Historic District of San Juan Bautista. It was designated a Registered National Historical Landmark in 1970. The sign says it was built in 1799, but, according to this National Park Service article, the building was constructed in 1834. Jose Tiburcio Castro, a Mexican official, built it for his residence.
Still, there could be truth in the sign. I've got it on my list to find out the story. I'm also curious as to how the building became known as the Anza House. Anyone know?
5/28 update: According to the research done by the current owner of the Anza House, the original construction date is 1799. Read the owner's comment below for more details. Thank you!