Dubuis House Marker; photo by Jimmy Emmerson DVM on Flickr (noncommercial use permitted with attribution / no derivative works).
TX Historic Marker Program
"As one of the most visible programs of the Texas Historical Commission, historical markers commemorate diverse topics including: the history and architecture of houses, commercial and public buildings, religious congregations, and military sites; events that changed the course of local and state history; and individuals who have made lasting contributions to our state, community organizations, and businesses.
Historical markers can be found in all 254 Texas counties. Age, significance, and architectural requirements govern the eligibility of topics." - Texas Historical Commission.