The Islamic Centre Hamburg (German: Islamisches Zentrum Hamburg, abbreviated as IZH; Persian: مرکز اسلامی هامبورگ, romanized: Markaz-e Eslāmī-ye Hambūrg), was the proprietor organisation of the Imam Ali Mosque (German: Imam-Ali-Moschee) also known as the Blue Mosque (German: Blaue Moschee), the oldest mosque in Hamburg, Germany. It was established in the late 1950s by a group of Iranian emigrants and construction was completed in the early 1960s. The IZH served both as a place of worship and of inner- and inter-religious dialogue. It was generally considered that the mosque was aligned with the Government of Iran, both during the Shah's reign and later following the 1979 Iranian Revolution. Amid investigations into these latter ties, the Federal Ministry of the Interior and the Homeland deemed the IZH to be unconstitutional in July 2024, leading to the mosque’s closure and the building being placed under the ministry’s administration. The IZH challenged the decision in the Federal Administrative Court. As of July 2025, the case was pending, and until the court rules on the legality of the closure and the federal takeover of the building, it cannot be repurposed or reopened.
