Baha'u'llah arrived in Baghdad on 8 April 1853. The journey from Tehran had been very difficult and had lasted three months. After a few days in Baghdad, Baha'u'llah moved to Kazimayn, a Shi'i shrine city which at that time was some five kilometers north-west of Baghdad (it has since become incorporated into the city). The Iranian consul suggested to him that since Kazimayn tended to be full of rather fanatical elements, it would be safer for Baha'u'llah if he lived in Baghdad itself in the mainly Persian-speaking quarters on the west bank of the Tigris river. Baha'u'llah consented to this and rented a house there.
(Moojan Momen, 'Baha’u’llah A Short Biography')