This work is about Kreuzenstein castle and the 1894-95 build city hall of Korneuburg, which were built close to each other (4350m air-line distance), at a similar time (1874-1912 and 1892-1896) and in a similar architectural style, the neo-Gothic. In the first chapter the Kreuzenstein castle is presented regarding the prehistory, the building-owner Hans Count Wilczek and the reconstruction from 1874 to 1912. The building per se is pictured just as the architects Karl Gangolf Kayser and Humbert Walcher knight of Molthein. The chapter gets closed with the opinions and write-ups of the castle. The second chapter contains the city hall of Korneuburg, the history of the city, the new construction from the development 1892 to the completion 1896, the specification of the building then and now, the architect Max Kropf and the opinions of the city hall. In the third chapter both of the buildings get compared, commonalities get illustrated , also differnetials get namend.