Texas Books portalThis category is for educational organizations established in the 15th century. 10th11th12th13th14th15th16th17th18th19th20th Subcategories This category has the following 3 subcategories, out of 3 total. I Educational institutions established in the 15th century (1 C, 95 P)L Libraries established in the 15th century (11 P)M Museums established in the 15th century (1 P)