The Bishop's Palace, also known as Gresham's Castle, is an ornate 19,082 square feet (1,772.8 m2)[2] Victorian-style house, located on Broadway and 14th Street in the East End Historic District of Galveston, Texas.

The house was built between 1887 and 1892 by Galveston architect Nicholas J. Clayton for lawyer and politician Walter Gresham, his wife Josephine, and their nine children.

Construction costs in 1892 are estimated at $250,000, while Clayton condensed many elaborate and eclectic design features onto a small homestead.

Since Galveston experienced little population growth in the twentieth century, the high Victorian design of Bishop's Palace and other Clayton works from the 1890s characterize the town's architectural landscape.

Clayton constructed other exterior features from a variety of Texas stones, including granite and sandstone, all custom-cut on site.

[5] In 1923 the Roman Catholic Diocese of Galveston purchased the house, and, situated across the street from the Sacred Heart Church, it served as the residence for Bishop Christopher E.

[6][failed verification] After the diocesan offices were moved to Houston, the diocese opened the mansion to the public in 1963, with proceeds from tours being used to help fund the UT medical school's Newman Center, which operated in the basement.