What Happened in 1255
- S 1
- S 2
- M 3
- T 4
- W 5
- T 6
- F 7
- S 8
- S 9
- M 10
- T 11
- W 12
- T 13
- F 14
- S 15
- S 16
- M 17
- T 18
- W 19
- T 20
- F 21
- S 22
- S 23
- M 24
- T 25
- W 26
- T 27
- F 28
- S 29
- S 30
- Sep 1 Königsberg (modern day Kaliningrad) founded by Teutonic Knights and named in honor of the Bohemian King Ottokar II
- S 1
- S 2
- M 3
- T 4
- W 5
- T 6
- F 7
- S 8
- S 9
- M 10
- T 11
- W 12
- T 13
- F 14
- S 15
- S 16
- M 17
- T 18
- W 19
- T 20
- F 21
- S 22
- S 23
- M 24
- T 25
- W 26
- T 27
- F 28
- S 29
- S 30
List of Years
Gregory I
Gregory XIII
Julius II
Julius III
Leo X
Pius V