https://www.ecatholic2000.com/cathopedia/vol9/volnine210.shtml
Liber Diurnus Romanorum Pontificum — Catholic Encyclopedia (1913)
Liber Diurnus Romanorum Pontificum — full article from the original 1913 Catholic Encyclopedia (Volume 9). Free online Catholic reference.
liber diurnuscatholic encyclopediaromanorumpontificum