Аннотация:"Debates over the ways of the development of Islam inthe 20th century: Russia’s and Turkey’s Muslims at the1926 Mecca Congress"In this paper I explore some issues related to the Caliphatereformation projects, and the convening of the Congress of theIslamic World. My research is based on Russian historiographicmaterial and on published documents from the Russian archives.World War I, the Russian revolution of 1 91 7, and the end of theOttoman Empire started massive geopolitical changes in Eurasiaand affected the entire Muslim world, which had a direct impacton the interests of the British Empire. Not without the participationof the Britain Empire, the movement for the organization of aWorld Islam Congress and the creation of a new Caliphate hadbeen gaining strength. The Soviet government also decided tomeddle into this movement, with the aim of taking the Britishinitiative away and reinforcing its position among Soviet and non-Soviet Muslims. As a result, the 1 920s witnessed a conflictbetween the British and the Soviet geopolitical projects (whichunited anti-British powers), fighting over the influence on theMuslim world. After the rise of the Kemalist power, Turkey signedthe Treaty of Moscow (also known as the Treaty of Brotherhood)in 1 921 with the Russian SFSR, which strengthened their ties. Theabolition of the Caliphate in 1 924 and the subsequence uprising ofSheikh Seyid intensified the discussions concerning thedevelopment of Islam and the desirability of a restoring of theCaliphate. While the Cairo caliphate congress, organized withBritish support in May 1 926, resulted in failure; the Congress ofthe Islamic World, held from the 7th of June to the 5th of July inMecca, controlled by the Saudi dynasty, was, on the other hand, asuccess. Both Soviet and Turkish delegates took part in theCongress. During the Congress, the decision was taken to endowthe Congress of the Islamic World with the status of aninternational organization, while the question of the Caliphatewasn’t even raised. In sum, the Mecca Congress in 1 926 marked avictory for anti-British powers and played a crucial role instrengthening Muslim countries.