101 S. Main Avenue(Col. Williams' General Store)One of the oldest buildings in Aztec, by 1890 it housed a general merchandise store operated by Civil War veteran Col. W. H. Williams. The building was made of adobe, then faced with brick in 1919 to house the Aztec State Bank. Col. Williams was a member of the Aztec Town Company.
http://aztecnm.com/aztec/downtown.html
Original source can be found here.