Kate Middleton didn't wear her engagement ring that once belonged to Princess Diana at the Royal Marsden Hospital in London on Jan. 14. Inside why and more about Princess Kate's new ring.

The guidance around the Princess’s return to public-facing engagements hasn’t changed and will continue to be gradual. Today was about visiting the Marsden to reflect on her own personal journey.”Kate’s husband,

Catherine, Princess of Wales carried out a deeply personal engagement on Tuesday, visiting the London hospital where she underwent cancer treatment to express her gratitude to the staff who supported her over the past year.