· www.siepmannkunst.com
- Siepmann-Kunst UG (haftungsbeschränkt)


· Art Trade

- eBay-Shop hjs-kunst · Art of the 20th century

- Art Trade · Agency of artworks
- Photo-Shop · Sale of my own Photos

· Design
-
Computer-aided-design · Layout of advertising media

- Webdesign · Everything for your internet presence