Thomas Müller Ivan Reimann Architekten is a Berlin-based architectural firm established in 1988 by Thomas Müller and Ivan Reimann. The partnership has since expanded to include Regula Scheibler and Torsten Glasenapp and manages a core staff of around 70 permanent members. The firm operates from Kurfürstendamm, a prominent boulevard in Berlin.
Thomas Müller Ivan Reimann Architekten specializes in a diverse array of architectural work, covering large-scale urban construction, detailed interior design, exhibition concepts, and the restoration and renovation of historic buildings. Their portfolio spans office buildings, educational institutions, residential complexes, and infrastructure projects. Notable among their German projects is the extension to the Federal Foreign Office in Berlin, built between 1996 and 1999 for over 2,000 employees; this project won the BDA prize and features transparent facades that integrate the old and new structures while meeting modern environmental standards.
Another significant work is the Marienturm and Marienforum in Frankfurt’s financial district, completed between 2013 and 2019, totaling over 92,000 square meters and serving as a new centerpiece for the local business area. Internationally, the firm has continued to obtain recognition with ongoing projects such as the ZigZag Haus in Prague, which combines residential and commercial uses and is expected to be completed in 2026.
The firm is engaged in both design and project supervision with an integrated consultant team. Partners also contribute to teaching and advisory boards, strengthening the practice’s links between architecture and academic research. Their work consistently emphasizes architectural quality, functionality, sustainability, and respect for historical context.