He posthumously honored her empress and , saddened greatly by her death , kept her casket in the palace for almost three years , only finally burying her in 778 .
Also in 775 , Emperor Daizong 's favorite concubine Consort Dugu died .
Emperor Daizong posthumously honored Emperor Daizong 's empress and , saddened greatly by her death , kept her casket in the palace for almost three years , only finally burying her in 778 .
Also in 775 , Emperor Daizong 's favorite concubine Consort Dugu died .