It’s one of the great weekends of the year. Hundreds if not thousands of fans descend upon a splendid and historic venue, wearing their colours, cheering on the proceedings. There’s always the chance of an upset but, whatever the outcome, this will be a day some people remember for the rest of their lives.

Sorry – did you think I was referring to the FA Cup? Well, it’s true the final takes place at Wembley today. But, about 22 miles to the west, St George’s Chapel at Windsor Castle is playing host to the wedding of Lady Gabriella Windsor (52nd in line to the throne, apparently) and Thomas Kingston. It’s the third royal wedding in the Chapel in a year, and a year almost to the day since the wedding of Prince Harry and Meghan Markle.

This poses a problem for the second year running for Prince William, who is President of the Football Association. Last year, his duties as best man meant that the wedding took priority over attending the Cup Final. The word is that he may get to the match this year. In any event, he needs to have a word with any remaining eligible relatives, to tell them to choose another date in 2020 or beyond.

Today’s reception will be at Frogmore House, much less well known than the Castle, but in some ways just as interesting. George III bought the house for his wife Queen Charlotte in the 1790s, and the Crown purchased the lease on the wider estate 50 years later. Victoria often worked on state papers here and she and Prince Albert are buried in a mausoleum on the estate (which isn’t open to visitors).

In contrast with the extravagance of the Castle, Frogmore is filled with wax fruit, artificial flowers and chinoiserie. There’s a room of floral paintings by Mary Moser and, to add some royal glamour, the Britannia Room showcases memorabilia relating to the royal yacht of that name. The gardens were restored in time for the present Queen’s silver jubilee in 1977. Frogmore House and Gardens is about to open (28-30 May) for its annual charity days, so do go if you have the chance. Whether you like the house’s contents may depend on your view of what Victorians found tasteful, but there’s no doubt it’s a royal day out with a difference.