The coat of arms of Michael O'Connor, Bishop of the Roman Catholic Diocese of Pittsburgh from 1843 to 1860.
I used the following images to create this image:

20x20px Bishop galero with fiocchi.svg by Alekjds (talk · contribs)
20x20px Roman Catholic Diocese of Pittsburgh.svg by Alekjds (talk · contribs)
20x20px Heraldic Lion 05.svg by David Liuzzo (talk · contribs)
Own work
Alekjds