The late tenth to early thirteenth centuries (about AD 950-1250) appear to have been exceptionally warm in western Europe, Iceland and Greenland (Alexandre 1987, Lamb, 1988) This period is known as the Medieval Climatic Optimum China was, however, cold at this time (mainly in winter) but South Japan was warm (Yoshino, 1978) This period of widespread warmth is... (climatism.blog)
The most important of these is the middle section dealing directly with St Francis's encounter with Islam and Sultan al - Malik al Kamil, the ruler of Egypt, Palestine and Syria, during the Fifth Crusade in the early thirteenth century. (faith.org.uk)
The Dominicans, founded by St Dominic (1170 - 1221) in 1215, like the Franciscans, date from the early thirteenth century. (religion-online.org)