The following is a list of museums ranked according to their floor area where published by reliable sources. Only museums with more than 20,000 square meters (220,000 sq ft) of floor space are included. Discover the 15 largest museums in the world by collection size. From the Smithsonian's 154+ million items to the Louvre's masterpieces, explore verified data in 2026. To really compare the world's biggest museums, you need to look at both the size of the collection and the size of the exhibition space. Here is a ranked list of nine colossal cultural. In this article, we have gathered the world’s largest museums, whether by size, collection, or research center, and examine what each of these incredible institutions has to offer for the millions of visitors who trek there every year. The Smithsonian Institution is not just *a* museum; it’s a sprawling complex of 19 museums, 9 research centers, and the National Zoo, making it the world’s largest museum, education, and research complex. Its layout proves that practical design can still inspire awe in the world’s oldest and largest military aviation museum. These ten museums serve as the epicenter of art and science, attracting visitors and celebrating cultural diversity. Join us as we embark on a detailed exploration of the five colossal cultural landmarks that stand out as the world’s largest museums, offering in-depth insights into what makes each one so extraordinary and a must-visit destination for enthusiasts of history and art. Discover 10 of the World's Most Gigantic Museums Whether by area or by size of their collections, these museums, from the Met to the Neues Museum, are massive! You’ll recognize some names that are both landmark and museum, such as Paris’ iconic Louvre and the gala-hosting Metropolitan Museum of Art in New York City. So in this article we compiled the 10 biggest museums in the world, ranked by area covered. Let’s start! The following is a list of art museums projected to offer at least 8,000 square meters (86,000 sq ft) of gallery space in the future or increase their current gallery space, following construction, expansion, or renovation.