Located just across the Missouri River from St. Louis in Cahokia, Illinois, the Church of the Holy Family is the oldest continually operating Roman Catholic parish in the United States and the oldest church west of the Allegheny Mountains. It was established by French priest Father St. Cosme, who worked with two French laborers to build a log rectory and chapel here in 1699. The original log church was destroyed in a fire in 1783 and the first Mass was celebrated in the current log church in 1799—making this is an historic church indeed. Members of the Lewis & Clark expedition may have worshipped here, and the church was a center for Roman Catholic missionary activity in the area.
Constructed of black walnut timbers in the traditional French Colonial vertical log style, the Log Church is one of only five built in this style that still exist in North America. The roof timbers are oak and the roof itself is made of cypress clapboards covered by sycamore. Wooden pegs were used in the construction instead of nails. A Latin mass is celebrated here each Sunday.
You’ll find the Church of the Holy Family at 116 East First Street in Cahokia, Illinois.