On the night al-Hādī dies, the caliphate passes to his brother Hārūn — the reign that became the imagined golden age of Baghdad.
The imam of Madinah, author of the Muwaṭṭaʾ, dies in the city he almost never left, in his mid-eighties.
During the days at Qubāʾ the first mosque of Islam is laid out — "founded upon taqwā from the first day".