On July 1, 1862, 162 years ago, Emperor Alexander II approved the "Regulations of the Moscow Public Museum and the Rumyantsev Museum," which became the first legal document defining the management, structure, and activities of the Museum. This was the first public museum in Moscow (now the Pushkin Museum of Fine Arts), which included the first free public library in the capital. Besides the Library, this remarkable cultural center included several departments: manuscripts, rare books, Christian and Russian antiquities, fine arts, ethnography, numismatics, archaeology, and mineralogy. Six months later, the first reading room was opened here. From its earliest days, the Moscow Public and Rumyantsev Museums began to grow "through private donations and public initiatives." The Library played a significant role in the development of Russian culture. Its readers included major Russian writers, historians, scientists, and thinkers. In February 1917, the Imperial Moscow and Rumyantsev Museum was renamed the State Rumyantsev Museum (SRM), and the SRM Library, shortly after the return of the capital to Moscow in March 1918, became the country's main library. In 1924, a public library was created on its basis, which since 1925 was called the State Library of the USSR named after V.I. Lenin, and in 1992 it was renamed the Russian State Library (RSL). Today, the RSL is the national and largest public library in Russia, one of the largest libraries in the world. It houses a unique and universal collection of publications in 367 languages ​​of the world - over 48 million storage units. Nearly 4,000 people visit it every day, and virtual reading rooms located in 80 cities in Russia and other countries serve over 8,000 visitors daily. The library also holds the most valuable manuscripts from the 6th to the 20th centuries. The RSL conducts extensive research in the field of Russian and foreign book publishing history. It is the largest scientific center in Russia in the fields of library science, bibliography, and book studies. There is no branch of the economy, science, or art that is not reflected in the sources kept here.