 Soon after , on September 28 , 1903 , the congregation relocated to the basement of St. Mary 's Polish Church , which was also located in New Kensington . Here , the first parish register was created . The first recorded event in the new parish was a marriage on December 27 , 1903 . Soon after , the Burrell Improvement Company donated land on the corner of Ridge Avenue and Constitution Boulevard . On July 4 , 1905 , the cornerstone of St. Peter Church was laid and on September 25 , 1905 , Bishop Regis <unk> dedicated the new church . 
