The professional breadth of the deceased is reflected in this memorial publication through the diversity of authors and their contributions, written by companions from academia, consultancy, the judiciary, tax administration, and business. On the occasion of the death of Prof. Dr. Andreas Musil, they have illuminated various areas of tax law. The result is a work in honor of the deceased, featuring a wide range of high-caliber contributions: from the function and design of taxation in the welfare state to income tax law, value-added tax law, international and European tax law, issues of non-profit status, as well as the taxation of public entities, local taxes, and levies.