Palace of Westminster

The Palace of Westminster (ウェストミンスター宮殿), also known as the Houses of Parliament, is the home of the parliament of the United Kingdom, located in, London. The building and its distinctive clock tower, commonly known as Big Ben (ビッグ・ベン), are famous landmarks and cultural icons of the United Kingdom.

British Royal Family Arc
The Palace of Westminster was one of the various sites seized by the Knights of England during Carissa's coup d'état attempt.

Coronzon Arc
The Palace of Westminster was the site of Kamijou Touma and Aleister Crowley's initial encounter with Orsola Aquinas when she was fused with Isis-Demeter. Not long afterwards, Holegres Mirates was launched into the face of Big Ben from Trafalgar Square by Accelerator.

Trivia

 * When looking at the clock tower during the events in December, Touma thinks it is called Big Ben, but also vaguely recalls hearing that it had been renamed. Big Ben is the nickname of the clock's Great Bell, and is a usually extended to refer to both the clock and the clock tower. In real life, the official name for the tower was originally the Clock Tower but it was renamed to Elizabeth Tower in 2012 to celebrate the, though the nickname still remains the most commonly used name for the tower.