Original sentence: After he widowed, he married Jeanne of Dammartin, Countess of Ponthieu, before August 1237.He thus became the first sovereign of both kingdoms since the death of Alfonso VII in 1157
Edited sentence: After he was widowed, he married Jeanne of Dammartin, Countess of Ponthieu, before August 1237.He thus became the first sovereign of both kingdoms following the death of Alfonso VII in 1157