The monastery 's construction began in 1318 by Afonso Sanches , bastard son of King Denis of Portugal , and his wife , Teresa Martins Telo .
Head entity: denis of portugal Q212890 15 16 17
Tail entity: afonso sanches Q541096 8 9
Relation (head \u2192 tail): P22
Inverse relation (tail \u2192 head): P40