the dallas county courthouse, built in 1892 of red sandstone with rusticated marble accents, is a historic governmental building located at 100 south houston street in dallas, texas. also known as the old red courthouse, it became the old red museum, a local history museum, in 2007. it was designed in the richardsonian romanesque style of architecture by architect max a. orlopp, jr. of the little rock, arkansas based firm orlopp & kusener. in 1966 it was replaced by a newer courthouse building nearby. on december 12, 1976, it was added to the national register of historic places. in 2005–2007 the building was renovated.