Colegio de Humanidades de Calera de León Historical milestone · Calera de León, Tentudía, Badajoz Image of Calera de León, not of the place itself. The Order of Santiago moved to Calera de León, then called Al-Caxera in the Arab period, a school of humanities from León, which became the most prestigious educational institution in Extremadura until the mid-19th century. 1562 Photo: José Luis Filpo Cabana (CC BY-SA 4.0) What to see and do in Calera de León