#= sunday letter: b, rule number: 20, Diœcesis Urbis seu Romana
02-15=Urbis/02-13-GregoriusII~02-15;;1570
02-21=02-09;;1888
02-23=02-23o;;1888 1906
02-28=02-23r;;1888 1906
03-22=03-24;;1888 1906
03-23=03-18;;1888 1906
04-18=Urbis/04-06-XystusI;;1570
04-19=Urbis/04-07-CoelestinusI;;1570
04-20=04-11;;1570 1888 1906
04-21=Urbis/04-12-JuliusI;;1570
04-28=Urbis/04-17~04-28o;;1570
06-06=Urbis/05-26o;;1570
06-07=Urbis/05-30;;1570
06-10=05-01~06-10;;1888 1906
06-18=05-27~06-18t;;1906
07-12=07-10~07-12o;;1570
08-28=08-28cc;;1888 1906
09-07=08-28;;1888
09-12=08-28~09-12bmv;;1906
dirge1=01-24 02-07;;1570
dirge1=01-29 02-03;;M1617
dirge1=XX-XX;;1888 1906
dirge2=02-28 03-14 03-28 06-08 07-07;;1570
dirge2=02-28 03-14 03-28 06-06 07-07;;M1617
dirge2=03-14 06-18;;1888
dirge2=03-14;;1906
dirge3=10-12;;1888
dirge3=10-11;;1906