The firm of the Dutch architect Anna Holtrop took on the job of bringing back and enlarging the former Customs House at the harbor of Manama. Raised in 1937, what is one of the oldest public buildings in the capital of the Kingdom of Bahrein was transformed in the 1980s into a post office clad in concrete and steel. Restoration work commenced in 2014 with the elimination of the facade and the portico, elements which had been added to the original volumes. The historical balconies were also restored, in a way that made them accessible to the public. Completing the project is a new volume of white hand-hammered concrete with cuts made at the corners. Its walls are 80 centimeters thick, like those of the old constructions. This extension contains 4,400 mailboxes and sorting facilities.

The renovation of the Manama Post Office has been shortlisted for the 2022 Aga Khan Award for Architecture.