Santos Lozano Building. Built in 1915, this commercial structure is the oldest existing brick building in Harlingen. It was designed and constructed by Baltazar Torres of Brownsville for the mercantile business of Santos Lozano. It also served as a community center, providing upstairs space for bilingual school classes and special events. A post office was included on the ground floor. Continuously owned by Lozano descendants, the structure has housed various businesses. #4590