The first Catholic house of worship in Ansonia was a white frame chapel erected on Main Street in 1867-1868. It was named The Church of the Assumption of the Blessed Virgin Mary. Starting as a mission of Derby, parish status was conferred in 1870. A new church, designed by architect Patrick C. Keeley, was later erected over eighteen years at 61 North Cliff Street. Ground was broken in 1889 and the cornerstone was put into place on Sunday, September 6, 1891. The basement chapel was completed and began to be used in 1900 (it was later remodeled to become the Church Hall in 1967). The completed edifice was dedicated in June 1907. The original plan called for a tower that was never built.
Church of the Assumption, Ansonia (1907)