RT Journal Article SR Electronic A1 Lyčka, Daniel T1 Hardtmuth's Trajan's Column, Kornhäusel's Summer Palace at Schüttel, Engel's completion of Pond House (Jägerhaus), and construction of pavilions belonging to Meierhofs. History of the disappeared and non-implemented structures of Prince of Liechtenstein JF Průzkumy památek YR 2019 VO 26 IS 2 SP 47 OP 66 DO 10.56112/pp.2019.2.05 UL https://pruzkumypamatek.cz/en/artkey/prp-201902-0005.php AB In this contribution, the author focuses on the selected structures which later disappeared or non-implemented structures erected for the field marshal Johann I Joseph, Prince of Liechtenstein and Mikulov, Duke of Krnov and Troppau, Count of Rietberg, etc. by his building directors and architects - Joseph Hardtmuth, Joseph Kornhäusel, and Franz Engel. They include the so-called Trajan's Column on Klein Anninger, later replaced by Phoenix Castle (no longer there), Pond House (Jägerhaus) near Lednice, and the summer palace at Schüttel, Vienna, as well as the pavilions near Meierhofs. Based on the remaining accounts and historical iconographic sources, the article aims to present these ducal structures to the public, some of them for the first time in history. Regarding the pavilions near Meierhofs in Lednice, Hohenau, and below Mödling Castle, the author aims to demonstrate that the rotunda near New Farm in the Lednice-Valtice Cultural Landscape definitely was not the only type of this structure in ducal domains.