Americans have often been fascinated with the families taking up residence at the White House. Oftentimes — at least since President Theodore Roosevelt, a famous animal lover, and with the emergence of photographs in newspapers — presidential pets have been under the same scrutiny as their distinguished masters.

President Joe Biden’s two German shepherds made the news even before Biden’s inauguration because one of them, Major, was set to be the first shelter dog at the White House. The dogs received a lot of attention also because they were to be the first pets at the White House in four years. President Donald Trump was the first president to have not had a dog since President William McKinley in 1897.

24/7 Tempo reviewed several sources on presidential history, including the White House Historical Association, presidential libraries, and museums of the National Archives to compile a list of 27 of the most famous pets who lived in the White House.

Most presidential pets since the 1900s were dogs. Before Theodore Roosevelt, many presidents and their families owned horses, birds, goats, and the occasional rabbit. Three alligators were also residents at the Executive Mansion during John Q. Adams and Benjamin Harrison’s administrations.

One of the most famous presidential dogs belonged to President Abraham Lincoln. The dog’s name was Fido. Fido was so famous, his name became a generic term for a dog. Here are the most famous dogs of all time.

Click here for 27 of the most famous pets who lived in the White House