St Columba's Church, Long Tower is a Roman Catholic Church in the Diocese of Derry. It is located in the heart of the city of Derry in Northern Ireland. The present church is built on the site of Roman Catholic worship which goes back as far as the 12th century. The current Long Tower Church began life in 1783 in a much smaller scale than seen today. Father John Lynch, a parish priest in Derry started action to raise funds for building the Long Tower Church and he received finance not just from Roman Catholics but also Protestant people in Derry at the time. The church was opened in 1788.