LONDON (AP) — King Charles III is back.

The 75-year-old monarch will resume his public duties next week following a three-month break to focus on his treatment and recuperation after he was diagnosed with an undisclosed type of cancer, Buckingham Palace said Friday.

Charles will mark the milestone by visiting a cancer treatment center on Tuesday, the first of several public appearances he will make in the coming weeks, the palace said. One of his first major engagements will be to host a state visit by the emperor and empress of Japan in June.

The palace didn’t provide an update on the king’s treatment, but said his medical team is “very encouraged by the progress made so far and remain positive about the king’s continued recovery.″

Charles continued his state duties, including reviewing government documents and meeting with Prime Minister Rishi Sunak after his diagnosis was disclosed on Feb. 5.