A hallucination is a perception in the absence of external stimulus that has qualities of real perception. Hallucinations are vivid, substantial, and are perceived to be located in external objective space.
Construction begins on Poland's tallest tower by Foster + Partners. Work has started on a 310-metre-high Warsaw skyscraper by Foster + Partners, expected to become the tallest building in Poland. The Varso Tower, or Warsaw Tower, is now under construction on a brownfield site next to the Warszawa Centralna railway station, with completion slated for 2020.
The Commerzbank Tower is the tallest building in Frankfurt and in Germany, measuring 300,1 m (985 ft) to the top of the antenna. The 56-story building was designed by British architect Norman Foster and was Europe's first ecological skyscraper.