In 1971, "Amar Shonar Bangla" became the national anthem of Bangladesh. It was written — ironically — to protest the 1905 Partition of Bengal along communal lines: cutting off the Muslim-majority East Bengal from Hindu-dominated West Bengal was to avert a regional bloodbath. Tagore saw the partition as a cunning plan to stop the independence movement, and he aimed to rekindle Bengali unity and tar communalism. "Jana Gana Mana" was written in "shadhu-bhasha", a Sanskritised register of Bengali, and is the first of five stanzas of a Brahmo hymn "Bharot Bhagyo Bidhata" that Tagore composed. It was first sung in 1911 at a Calcutta session of the Indian National Congress and was adopted in 1950 by the Constituent Assembly of the Republic of India as its national anthem. Tagore thus became the only person ever to have written the national anthems of two nations.