Old St. Patrick’s parish in Chicago was founded by Irish immigrants on Easter Sunday, 1846, at the onset of the Great Famine. The current church building was dedicated on Christmas morning, 1856. The church’s website timeline provides more history. The church also is detailed in the 1997 book, At the Crossroads: Old Saint Patrick’s and the Chicago Irish, by Ellen Skerret.
Images below from March 15, 2019. See the more than 20 St. Patrick’s churches that I have visited in America and Europe.