Conversation so far:
When did A.
C.
Bhaktivedanta Swami Prabhupada's journey start?
In 1922, when he first met his spiritual master, Bhaktisiddhanta Sarasvati Thakura, he was requested to spread the message of Chaitanya Mahaprabhu in the English language.
Did he do anything else with Bhaktisiddhanta?
In 1933 he became a formally initiated disciple of Bhaktisiddhanta.
Did he have a following?
In 1947, the Gaudiya Vaishnava Society recognised his scholarship with the title Bhaktivedanta.
Was he recognized for anything else?
he started the publication called Back to Godhead.
Did he write anything else?
where he began his commentary and translation work of the Sanskrit work Bhagavata Purana.
were his writings famous?
CANNOTANSWER.

Question: When was Back to Godhead written?
Self-contained rewrite: When was A. C. Bhaktivedanta Swami Prabhupada Back to Godhead written?