Sayn-Wittgenstein-Vallendar was a County of the Holy Roman Empire in Germany.
A city named "Vallendar" is included in the PC game Call of Duty 2.
Oligocene shingle (Vallendar facies) overlies the older surface near Kettenbach and Hausen über Aar.
He also holds the Ameritech Chair of Economic Development at the Indiana University School of Public and Environmental Affairs, and is director of the Institute for Development Strategies at Indiana University and a research fellow at the CEPR, London as well as an honorary professor at WHU-Otto Beisheim School of Management in Vallendar, Germany.