My favorite is at the Iglesia Bautista on South Stone Avenue downtown. Built in 1933, the church doesn't get the attention of its domed neighbors -- San Augustine Cathedral and the Jewish History Museum -- but the proportions of this small, simple church root it to the Barrio Viejo neighborhood.
The American Baptist Home Mission society spent $9,000 to build the church for Spanish speakers. Its first minister told a reporter for the Tucson Citizen years later that it was difficult to attract members in the heavily Catholic neighborhood. By 1939, he reported membership of 136. The church still operates today with what appears to be a smaller congregation.