Wedding of Queen Victoria and Prince Albert
The wedding of Queen Victoria of the United Kingdom and Prince Albert of Saxe-Coburg and Gotha (later Prince Consort) took place on 10 February 1840 at the Chapel Royal, St James's Palace, in London. The marriage united the young British sovereign with her German-born first cousin, strengthening dynastic ties within Europe's network of royal families.
Source: Wikipedia — Wedding of Queen Victoria and Prince Albert (CC BY-SA 4.0)