LORELAI: Are you sure you can’t come? [to a family dinner with Trix]
RORY: Yeah, I’m sure. If I’m not prepared tomorrow, Paris is gonna have me sent to the Tower.
Rory means the Tower of London, more correctly Her Majesty’s Royal Palace and Fortress of the Tower of London. It’s a historic castle on the River Thames in the City of London, and was built by William the Conqueror in 1066 as part of the Norman Conquest of England. Today it is one of the most popular tourist attractions in Lodnon.
Although the Tower of London’s original primary purpose was to be a palace and royal residence, it has been used as a prison from 1100 to 1952. Its peak period as a prison was the 16th and 17th centuries, when “being sent to the Tower” meant you were going to prison. Queen Elizabeth I spent time there before she was queen.