The National Museum of Modern and Contemporary Art (MMCA) in Korea has four different buildings, in Gwacheon, Seoul, Deoksugung and Cheongju. All of them closed in February 24, when South Korea had 763 COVID-19 cases countrywide (according to the WHO situation reports). Luckily, an online museum also exists, and you can visit it below:
"Since its opening in 1969, the National Museum of Modern and Contemporary Art, Korea (MMCA), has stood by the history and progress of Korean contemporary art, securing its footing as a cultural institution representative of Korea.
With the opening of MMCA Gwacheon in 1986 and additional opening of venues in Deoksugung, Seoul, and Cheongju in 1998, 2013, and 2018, respectively, the MMCA has established a four-museum system within which the four venues interact organically with one another while retaining their individual identities: MMCA Deoksugung as a museum specializing in extensive genres of Korean modern art including calligraphy and literature; MMCA Seoul as the face of Korean contemporary art and a central exhibition space for the latest artworks; MMCA Gwacheon as a research and family-oriented space with a children's museum dedicated to broadening the terrain of art history to the fields of architecture, craft, print, and design; and MMCA Cheongju as a museum in charge of the virtuous circle of artworks' life from collection and research to conservation and exhibition."
— Youn Bummo, director of the MMCA