Altes Stadion Karlsruhe, Sports stadium at Karlsruhe Institute of Technology campus, Germany.

Altes Stadion Karlsruhe is the surviving grandstand building of a stadium designed by Hermann Alker and completed in 1930 on the KIT South Campus at Paulckeplatz. Its reinforced-concrete roof cantilevers 11 metres without columns, and beneath the stands a sports hall is carried by pointed segmental arches. Concrete is left unplastered inside and out, with exposed-aggregate concrete on the base storey.

The facility opened in 1930 according to architect Hermann Alker's design and has shaped the campus landscape since then. It escaped demolition in the 1970s through public discussion and was later designated as a cultural monument.

The stadium now serves as a venue for student activities and community programs at Karlsruhe Institute of Technology. Visitors can experience how this historical location remains actively used through cultural events and gatherings.

The grandstand building stands at Engesserstrasse 17 on Paulckeplatz, on the southern campus of the Karlsruhe Institute of Technology in the Innenstadt-Ost district. The site is reached on foot from the campus paths; the building is used by the student-run Arbeitskreis Kultur und Kommunikation for events, so access to the interior depends on their programme.

The cantilevered grandstand roof, completed in autumn 1930 by the Stuttgart concrete firm Wayss & Freitag, was modelled on the grandstand of Munich's Dantestadion, but Alker left out its roof columns. Beneath the stands, a sports hall is carried by pointed segmental arches. A planned front stand that would have raised capacity from 800 to 1588 seats was never built; concrete elements recreated it during the 1994/95 renovation.