Kate Middleton visited the Royal Marsden Hospital in London on Tuesday, Jan. 14, where she received chemotherapy treatment after her cancer diagnosis last year. See all the photos here

The Princess of Wales wanted to “show her gratitude to the incredible team, but also highlight the world leading care and treatment the Marsden provides.”

Kate Middleton has made an emotional visit to the Royal Marsden Hospital in London to personally thank staff who took care of her during her cancer treatment last year. Dressed in a long brown checkered coat atop a maxi burgundy dress,

Kate, the Princess of Wales, made a poignant return Tuesday to the same hospital where she received treatment after being diagnosed last year with cancer.

The Princess of Wales made a surprise return to the Royal Marsden Hospital to personally thank staff who looked after her during her cancer treatment on Tuesday. At such a critical moment in US history, we need reporters on the ground. Your donation allows us to keep sending journalists to speak to both sides of the story.

"Going through the back door unseen while going through the treatment must have been pretty lonely," a close royal insider tells PEOPLE in this week's exclusive cover story. "When you see these other people when they’re having their chemotherapy,

There's no denying that Kate Middleton has an impeccable sense of style, but the princess is very rarely seen actually doing the shopping. Not to mention, after being diagnosed with cancer last year,