The episode about Princess Margaret's wedding in The Crown is titled “Matrimonium.” It is the seventh episode of the show's second season.
The Latin title means “marriage,” fitting an episode centered on Margaret's decision to marry photographer Antony Armstrong-Jones, later known as Lord Snowdon. The story follows her emotional reaction to Peter Townsend's engagement to another woman, her developing relationship with Armstrong-Jones, and the royal protocol surrounding the announcement.
The episode concludes with Margaret and Armstrong-Jones's wedding at Westminster Abbey. In real life, the ceremony took place on 6 May 1960 and was televised, making it a landmark moment in royal broadcasting. Margaret's wedding dress was designed by Norman Hartnell, who had also designed Queen Elizabeth II's wedding gown.
“Matrimonium” is sometimes confused with “Beryl,” which focuses on Margaret's earlier romantic life, or “Mystery Man,” which centers on another storyline. The episode dramatizes the relationship, but the wedding itself and its date are historical.