The Tuileries is a large formal garden in the centre of Paris, between the Louvre museum and the Place de la Concorde. It is one of the most walked-through places in the city: straight gravel paths, trees in neat rows, round ponds where children push toy boats, and green metal chairs you can drag anywhere you like and sit on for free. In English we usually say the Tuileries or the Tuileries Gardens, always with the — and although the -s makes it look plural, we treat it as one place, so "the Tuileries is beautiful" is normal. The name is older than the garden. There was a Tuileries Palace here too, built by Catherine de' Medici in the 1500s; it burned in 1871 and was pulled down, which is why the Louvre now has that wide open end facing the trees. So in a history book the Tuileries may mean the palace and the royal family kept inside it during the Revolution, not the garden — worth knowing if the sentence is about 1789 rather than about a holiday. English speakers do not agree on how to say it. Something like "TWEE-luh-reez" is the common English attempt; people who know French get closer to "twee-luh-REE" with no -s sound at the end. Nobody will mind either way.