.....This fine residence was first constructed in 1857. Originally it was constructed by Colonel John S. Sydnor, mayor, slave dealer and businessman. As mayor from 1846-47, he helped institute the city's plice and fire departments and the first city market was constructed. He also helped start a city-sponsored free school system, which later went bankrupt because no taxes were levied in its support.
.....Later it was sold to Sampson Heidnenheimer, a merchant who owned one of the largest grocery wholesalers in Texas. It was referred to often as "Heidenheimer Castle" as it had been contructed and added on in a grand castle-like style. Heidenheimer added the tower in 1885.
.....After the grade-raising, this building was not raised, but rather the fill was simply placed around the building. The building was a run-down rooming house in the 1970's, until it was finally demolished in 1974 after having been gutted by fire.

S. Heidenheimer Residence from "A Souvenir of Galveston" circa 1900

Heidenheimer Residence circa 1965, HABS/HAER photograph