Bürohaus an der Alten Oper, High-rise office building in Financial District, Germany

The office building at Old Opera is a 20-story high-rise in Frankfurt's financial district, rising at the corner of Neue Mainzer Straße and Junghofstraße. Its glass and metal facade creates a clean, contemporary look that defines the urban landscape.

The 20-storey tower was built between 1981 and 1984 to designs by Hubertus von Allwörden, Gerhard Balser and Rolf Schloen. It was long known as the Citibank-Hochhaus because Citibank was its main tenant for many years. Current tenants include Bloomberg L.P., the investment bank Lazard, the law firm Herbert Smith Freehills and Bank of Communications.

The building sits next to the Old Opera House and creates a visual link between Frankfurt's financial core and its arts venues. Visitors notice this spatial relationship when walking through the surrounding streets.

The tower stands on Neue Mainzer Straße, a short walk from the Alte Oper and the Taunusanlage station area. The ground floor holds a BYD store open to passers-by; the office floors above are reached by tenants and their guests.

The tower's 20 storeys were designed by Hubertus von Allwörden, Gerhard Balser and Rolf Schloen, and it kept the name Citibank-Hochhaus long after the bank's tenancy. Among today's office tenants are the investment bank Lazard and the law firm Herbert Smith Freehills.