Trianon

Trianon is a 45-storey, 186 m (610 ft) skyscraper in the Westend-Süd district of Frankfurt, Germany, completed in 1993. For several decades until 2024, it served as the headquarters for DekaBank; other tenants are Deutsche Bundesbank (since 2015) and Franklin Templeton. Atop the building is an inverted pyramid suspended from the three corners. As of 2023, the tower is the eighth-tallest skyscraper in Frankfurt and also in Germany. The Trianon's layout is roughly the shape of an equilateral triangle, the corners of which are formed by three-sided towers. The end is an inverted three-sided pyramid on the roof. It is the first structure in Germany to use high-strength concrete.

Building data from Wikidata (CC0); heights normalised. Summary from Wikipedia (CC BY-SA).