Boardgamegeek https://boardgamegeek.com/boardgameexpansion/150083/castles-burgundy-4th-expansion-monastery-boards
Anglais - The 4th Expansion is a new game board with Monasteries printed next to the play area. It comes with 4 new boards numbered 13a to 13h (back to back 13a-13e, 13b-13f, 13c-13g, 13d-13h).