Williams-Gierth House

Williams-Gierth House, also known as The Castle House is a historic home located at Poplar Bluff, Butler County, Missouri. It was built in 1892, and is a large $2 1/2$-story, irregular plan, Shingle Style dwelling. It features a reconstructed wraparound porch, two turrets, and a hipped roof with polygonal dormer.

It was added to the National Register of Historic Places in 2012.