Sebastopol. This Greek Revival house was built in 1854-56 by Joshua W. Young with unreinforced, load-bearing walls of cast-in-place limecrete, an early form of concrete made of lime, sand, and gravel. Joseph Zorn, Jr., mayor of Seguin from 1890 to 1910, bought the house in 1874 and it remained in his family until 1961. One of many concrete structures built in Seguin, this is an important surviving example of early concrete technology in the southwest. Recorded Texas Historic Landmark, 1964 #4627