Funkturm im Arsenal, Communication tower in Arsenal district, Vienna, Austria

Funkturm im Arsenal is a 155-meter-tall concrete tower that rises above Vienna's third district with a design based on straight lines and geometric forms. The structure houses data centers and communications equipment that support the city's modern networks.

The tower was completed in 1975 to plans by Max Agnese (Kurt Eckel's office) and opened with the adjacent telecommunications centre on 8 September 1978. Until 2001 all ORF radio and television programmes ran analog from the Küniglberg centre to the transmitters via this tower. In 1981 Austria's first fibre-optic cable was put into service from here to the Meidling exchange.

Locals call the tower "Alfred", and its nickname appears in no official sign. The site belongs to the former military Arsenal, whose workshops once stood beside the cable-drum yard where the tower was built. The tower itself is closed to the public, unlike the Donauturm, so the nickname circulates by word of mouth rather than on site.

The tower is located in the third district and is easy to spot from the street due to its height above the surrounding area. Keep in mind this is an active work facility, so interior access is generally not available to visitors.

The tower's nickname among locals is "Alfred". Its shaft was built using a sliding formwork method, and the four concrete antenna platforms were cast on the ground and then lifted into place by twelve hydraulic jacks at a rate of 9.4 metres per day. The first fibre-optic cable in Austria entered service here on 3 November 1981, running to the Meidling exchange.