CREATE TABLE table_26517 ("Co-king" TEXT, "Relationship to Monarch" TEXT, "Crowned" TEXT, "Co-kingship ceased" TEXT, "Reason" TEXT, "Monarch" TEXT)

Name the total number of monarchs for 23 may 1059 crowned
SELECT COUNT("Monarch") FROM table_26517 WHERE "Crowned" = '23 May 1059'
SELECT COUNT("Monarch") FROM "table_26517" WHERE "Crowned" = '23 May 1059'