During the analysis of the Hallstatt period settlement at Praha-Miškovice a new type of building structure has been identified. It consists of an exactly elliptical foundation trench for a wooden palisade. This elliptical construction from Praha-Miškovice has three striking parallels in Kuřim in Moravia, in Unterradlberg in Lower Austria and in Kösching in Southern Bavaria. For the first time, a type of monumental architecture independent from Early Iron Age fortifications and grave architecture can be established. The almost identical construction of elliptical monuments over great distances proves either the existence of a group of specialists or the transfer of special knowledge. This group –be they builders or architects– distinguished itself by remarkable mobility which has already been recognized for other craftsmen for a long time.