Daular Khmer tana gab da rugujewa.Bayan Champa ya ci Angkor, Jayavarman VII ya tattara sojoji ya sake kwace babban birnin kasar.Sojojinsa sun yi nasara a jerin nasarorin da ba a taba gani ba a kan Cham, kuma a shekara ta 1181 bayan da suka ci nasara a yakin ruwa, Jayavarman ya ceci daular kuma ya kori Cham.Sakamakon haka ya hau kan karagar mulki ya ci gaba da yaki da Champa na tsawon shekaru 22, har zuwa lokacin da Khmer ya ci Chams a shekara ta 1203 ya kuma ci yankuna da dama na yankinsu.^[41]Jayavarman VII ya tsaya a matsayin na karshe na manyan sarakunan Angkor, ba wai kawai saboda nasarar yakin da ya yi na yaki da Champa ba, har ma saboda shi ba azzalumi mai mulki ba ne irin na magabata na nan take.Ya hada kan daular tare da gudanar da ayyukan gine-gine na ban mamaki.An gina sabon babban birnin kasar, wanda yanzu ake kira Angkor Thom (lit. 'babban birni').A tsakiyar, sarki (shi kansa mai bin addinin Buddha na Mahayana) ya gina a matsayin haikalin jihar Bayon, ^[42] tare da hasumiyai masu ɗauke da fuskokin boddhisattva Avalokiteshvara, kowane tsayin mita da yawa, an sassaka shi da dutse.Sauran muhimman haikalin da aka gina a ƙarƙashin Jayavarman VII sune Ta Prohm ga mahaifiyarsa, Preah Khan don mahaifinsa, Banteay Kdei, da Neak Pean, da kuma tafki na Srah Srang.An shimfida hanyoyin sadarwa mai yawa da suka hada kowane gari na daular, tare da gidajen hutawa da aka gina don matafiya da kuma asibitoci 102 da aka kafa a fadin masarautarsa.^[41]