Hereditary Prince Alois, Prince Max, Prince Constantin and his wife Princess Marie as well as Prince Philipp and his wife Princess Isabelle were on an official visit to Russia yesterday. During the course of the visit, the Hereditary Prince took the opportunity to meet with Russian prime minister and former president Dmitry Medvedev. The visit to the Russian Federation coincided with the opening of an exhibition of parts of the Princely Family's art collection at the Pushkin State Museum as well as the Moscow opening of a travelling exhibit of Liechtenstein stamps.
While pictures of the visit are located here and here, videos can be found here and here. An interview with Prince Philipp about his family's banking business and the art of money-making is available at Russia Today (starting at 17:14).