In 1833, the original cottage-style entrance lodge to the zoo was built at a cost of £30. The thatch-roofed building is still visible to the right of the current entrance. In 1838, to celebrate Queen Victoria's coronation, the zoo held an open day - 20,000 people visited, which is still the highest number of visitors in one day. President of the United States Ulysses S. Grant (after leaving office) was among the celebrities who came to see Dublin's world-famous lions in the 19th century. The first tearooms were built in 1898.