Matthew III Csák
Máté Csák or Matthew III Csák (between 1260 and 1265 – 18 March 1321; Hungarian: Csák (III.) Máté, Slovak: Matúš Čák III), also Máté Csák of Trencsén (Hungarian: trencséni Csák (III.) Máté, Slovak: Matúš Čák Trenčiansky), was a Hungarian oligarch who ruled de facto independently the north-western counties of Medieval Hungary (today roughly the western half of present-day Slovakia and parts of Northern Hungary). He held the offices of master of the horse (főlovászmester) (1293–1296), palatine (nádor) (1296–1297, 1302–1309) and master of the treasury (tárnokmester) (1309–1311).