A new multi-purpose hall was built in the grand courtyard of the 1895 neo-renaissance Kaiserbad Spa, one of the classic symbols of the West Bohemian spa town of Karlovy Vary. The red steel extension rests on six ground supports, avoiding physical contact with the listed building. This way the contemporary intervention is visibly acknowledged and also reversible. The movable seating allows the space to be transformed into a conference room or a ballroom with a flat floor. The stage is equipped with acoustic wall panels, and there are movable parts to adjust the space for various acoustic requirements. The entire structure resembles a big red Transformer robot, which is in keeping with the industrial aesthetic of the bath as a whole, transforming the courtyard for a new function.