Buckingham Palace announced that the monarch is retiring from activity due to cancer. King Charles III reappeared in public this Tuesday when he left his London residence of Clarence House by car with Queen Camilla.

The 75-year-old monarch and his wife greeted the crowd smilingly from the back seat of the car. The tumor, of which the nature or severity has not been specified, was discovered during the hospitalization of Carlos III following an operation for "benign" prostate hypertrophy.