Texas The main article for this category is List of caliphs. Islam portalBiography portalHistory portalEgypt portal 11th12th13th14th15th16th17th18th19th20th21st Subcategories This category has the following 3 subcategories, out of 3 total. A 16th-century Abbasid caliphs (2 P)H 16th-century Hafsid caliphs (4 P)O 16th-century Ottoman sultans (1 C, 6 P)