Roselius

Roselius is a German surname. The most notable bearer is Ludwig Roselius (1863–1939), a Bremen-based entrepreneur who built the Kaffee HAG coffee business. In the early 20th century he developed a benzene-based decaffeination process, enabling the production of decaffeinated coffee and helping to fuel the growth of the modern coffee trade. His innovations contributed to Bremen's prominence as a center of international coffee commerce. In addition to his business career, Roselius funded cultural projects and collected art.

The Roselius Museum in Bremen is a private museum founded by Ludwig Roselius and housed in a historic building that formerly belonged to the Roselius family. The collection focuses on Northern European art, with an emphasis on German and Dutch Renaissance works. It presents paintings, drawings, and decorative arts from the 15th to 16th centuries and offers insight into early modern European artistic production. The museum is widely regarded as one of Bremen's oldest private museums and serves as a key example of private philanthropy in the city.

The surname Roselius is of German origin and is borne by various individuals. The most prominent representation in public life is Ludwig Roselius; other individuals with the surname may be found in historical and contemporary records.