The Cathedral Church of St. Peter is an Episcopal cathedral in St. Petersburg, Florida, United States. It is the seat of the Diocese of Southwest Florida. It 2004 it was included as a contributing property in the Downtown St. Petersburg Historic District on the National Register of Historic Places. History St. Peter's parish was organized in 1889 and they built a frame structure at 11th Street and Baum Avenue. Peter Tomlinson donated land to the Episcopal Church at what is now the corner of 2nd Avenue North and 4th Street North in 1896 and the frame building was moved there. Three years later Edwin H. Tomlinson donated the adjacent property and $5,000 to erect a new brick church building. The original part of the present church building was constructed at that time. Over the years additions and alternations were made to the building as the congregation grew. In 1915 a new pipe organ and the room it is housed in were built. At the same time crenellated parapets were added to the east elevation of the side aisles. The tower and spire was raised from three to four stories around 1920. An extension of the church building to the west and an intersecting double-width partial transept to the south was added in 1925. The addition, designed by the Rev. W.W. Williams, doubled the size of the sanctuary and cost about $66,000. In 1951 the sacristy was enlarged, and the south transept was designated St. Mary's Chapel the following year. The frame parish house was taken down in 1940 and a new parish house designed by William Harvard replaced it. Harvard designed an addition to the parish house that was completed in 1959. Copper panels replaced asbestos shingles on the spire in 1972. St. Peter's Church was designated the diocesan cathedral on November 18, 1969, the same year the diocese was established by the General Convention of the Episcopal Church. The parish acquired the former First Baptist Church facilities in 1990. The Baptist church's education building and St. Peter's parish house were torn down in 2008 to make way for a new multi-purpose building that was completed the following year. Architecture The cathedral is masonry building composed of blonde-colored bricks with pink mortar joints. The bricks are set in a Common bond pattern and every sixth course features Flemish headers. The tall tower and spire are located on the north side