Michael zu Löwenstein

ABG Frankfurt Holding Wohnungsbau- und Beteiligungsgesellschaft mbH develops, owns, and operates residential flats, municipal housing, and apartments. Its services include project development, real estate sales, house consultancy, technical building equipment, and architectural and engineering services. The company was founded in 1991 and is headquartered in Frankfurt, Germany.

Dom Römer GmbH is a private company based in Frankfurt am Main, Germany, with Regina Fehler as its CEO. The German company is involved in the old town projects and is responsible for the development of the new and old town district. The company offers a showcase of the city, including a booklet and an overview map, and provide contact information for those interested in their services. The company has won international awards for their work, and they offer new perspectives through drone flights. Dom Römer GmbH also provides news and downloads on their website.