Josef Paul Kleihues
The Triangle Building is situated in the middle of the complex of buildings in the Friedrichstadt district known as the American Business Center. The site, within the orthogonal order of the Friedrichstadt district which was bisected by the former Check point Charlie customs wall, is triangular in shape.
To convert the odd-angle shape of the site into a right-angled
triangle Kleihues developed a design grid which shifted the basic
geometrical form relative to the irregular boundaries of the
The building is characterized by two facade designs that are totally different in conception. The Friedrichstrasse and Schützenstrasse facades are clad in grey, unpolished granite, articulated by horizontal bands of windows, while the Mauerstrasse side is glazed throughout.
The site boundaries are reproduced in the arrangement of the
protruding glass facade on the Mauerstrasse side and in the run of
the windowsills on the "granite" Friedrichstrasse side, which
distorts the ground plan of the upper floors into an irregular
The building keeps to the traditional 22 meters height of the
eaves in the Friedrichstads area with the shops on the ground
floor, the offices above and the apartments, all with their own
terraces, on the recessed top floor. There are two core staircases
in the building that give access to corridors on the individual
floors. As always with a Kleihues building the quality of
construction is superb and the attention to detailing
Josef Paul Kleihues also designed the 1994 GSW multi-use
building, diagonally across from the Triangle building, that covers
an entire block. The glazing rises through the full height of the
building with bands of green glazed terracotta tiles dividing the
facade into a grid of squares.
Facts about Triangle Building
The building contains 4 shops, 94 offices and 6 apartments.
Architects: Josef Paul Kleihues
TCHA-Grundstücke Berlin GbR Berlin
Last updated: December 19, 2013
Out of the Ordinary: The Architecture and Design of Robert Venturi, Denise Scott Brown and Associates
Pittsburgh, Pennsylvania, USA