Charles was cheered by patients and staff at York Hospital, as he toured the site ahead of the opening of the Sir Robert Ogden Macmillan Cancer Centre.
He met patients including Lou Rhodes, 49, who is living with stage 4 secondary breast cancer, and was involved in the design and development of the centre as a patient representative.
Here are the best pictures from the visit provided by James Glossop of The Times via The Press Association:
1. King Charles III, Patron of Macmillan Cancer Support, speaks with medical staff
King Charles III, Patron of Macmillan Cancer Support, speaks with medical staff during a visit to the site of newly redeveloped Sir Robert Ogden Macmillan Cancer Centre in York Hospital. James Glossop/The Times/PA Wire Photo: James Glossop/The Times
2. King Charles III, Patron of Macmillan Cancer Support, speaks with medical staff
The King, royal patron of Macmillan Cancer Support, met people for whom the centre had been a lifeline during treatment James Glossop/The Times/PA Wire Photo: James Glossop/The Times
3. King Charles III, Patron of Macmillan Cancer Support, speaks with medical staff
He greeted Macmillan health professionals and cancer nurse specialists James Glossop/The Times/PA Wire Photo: James Glossop/The Times
4. King Charles III, Patron of Macmillan Cancer Support, speaks with medical staff
Charles also visited the centre’s purpose-built garden and planted a Macmillan rose with Colm Gough, Macmillan personalised cancer care lead, who is part of the team there. James Glossop/The Times/PA Wire Photo: James Glossop/The Times