In 1977, the Queen celebrated her Silver Jubilee. This jubilee marked the 25 anniversary of her coming to the throne. There was a royal procession in the golden State Coach. A service of thanksgiving was held at St. Paul's Cathedral. Millions of people watched on television. There were parties across the UK. Five commemorative stamps were printed in honour of the event. The Jubilee line of the London Underground opened in 1979, named after the anniversary.