10 Cats Who Made History

Larry, Chief Mouser of Downing Street
Chief Mouser Larry comes face to face with a police dog called Bailey as it does security checks outside the door of 10 Downing Street in London. JUSTIN TALLIS/AFP/Getty Images

It was 2011 and there was a bit of a mouse problem at 10 Downing Street, home of Britain's prime minister. So, a staff member plucked a feline from a rescue home to chase the mice away. The brown-and-white tabby chosen was named Larry, and his title was Chief Mouser to the Cabinet Office – the first cat to hold the title.

Larry's job performance gets mixed reviews. While Larry has been of marginal help dealing with the mouse problem, he appears to be well-suited to his other duties, such as welcoming visitors and seeking out the best napping spots. He's also known to get into fights with Palmerston, the Foreign Office cat, when they meet outside [sources: Lewis, Yahoo! News].

Some Brits fretted over Larry's fate after the country's 2016 "Brexit" vote, which resulted in a prime minister swap. Some wondered if Larry would be booted out along with David Cameron, since the tabby was officially a Cameron appointee. However, he's keeping his job under replacement Theresa May. Larry, say officials, is a civil servant.