Prince William and Kate Middleton are moving to Adelaide Cottage in Windsor, and apparently the home comes with a lot of history. While it was originally made for Queen Adelaide (King William IV's wife) in 1831, Adelaide Cottage is where Princess Margaret's boyfriend Group Captain Peter Townsend lived from 1944 to 1952-when he was equerry to King George VI. And apparently this is where some of their relationship took place.
According to The Sun, the property was the location of Margaret and Peter's "scandalous affair," which fans of The Crown know about in detail. But in case you need a quick refresher: Margaret and Peter had a relationship in 1952, the same year he filed for divorce in November 1952. Because Peter was divorced, he and Margaret couldn't marry with the blessing of the royal family.
Margaret eventually put duty to the crown before her relationship, and decided not not to marry Peter. She ended up marrying photographer Antony Armstrong-Jones, and they were together for 18 years before separating in 1976 and publicly announcing their divorce in 1978.
So yeah, Adelaide cottage has a lot of history! Though Peter Townsend is far from the last person to live there. The Daily Mail reports that the most recent person to live in Adelaide Cottage was Simon Rhodes (the son of the Queen's cousin Margaret Rhodes), and since then it's been used as a "grace and favor" residence, which basically means the royals allow people to live their rent free.
FYI, in addition to Adelaide Cottage, William and Kate own Anmer Hall (their "country home"), as well as Apartment 1 at Kensington Palace, where they keep their royal offices and are expected to move back to once their kids have grown up.