What is the name of the church in London where monarchs have been crowned for the last 950 years?

Westminster Abbey is the site where monarchs have been crowned for nearly a millennium, with a rich history that dates back over 950 years. The tradition of crowning British monarchs in Westminster Abbey began with the coronation of William the Conqueror in 1066. This historic church has been the venue for every coronation since then, making it a central location in British royal history. It is not only significant for coronations but also for royal weddings and funerals, further embedding its importance in the fabric of the British monarchy.

The other churches listed, although notable in their own right, do not have the same historic association with royal coronations that Westminster Abbey does. St. Paul's Cathedral, while an important Anglican church, has not been the site of coronations. Canterbury Cathedral is significant as the seat of the Archbishop of Canterbury but is not used for royal coronations. Southwark Cathedral, although a historic church, also does not share this longstanding tradition with the monarchy. Thus, Westminster Abbey stands out as the correct answer due to its pivotal role in the tradition of coronation ceremonies.