The so-called “Tränenpalast” was built on Friedrichstraße one year after the Berlin wall as a self-supporting aluminium and glass construction with ceramic tiles. Planned by the architect Horst Lüderitz, it separated the border crossing from the train station, letting passengers be checked on coming or going. In November 2008 the German parliament decreed that it be used as a memorial and showcase. This called for not only thoroughgoing renovation with an eye to historical conservation but also an annex with service rooms. The whole aluminium and glass construction was thermally insulated without changing its outer appearance and was fitted with insulating glass panes. A building linking it with the station had been scrapped in 1990 but was spatially recreated by extending the exhibition areas, so once more it can be experienced from outside. Since 2011 the foundation Haus der Geschichte of the German Federal Republic has been holding in the Tränenpalast the exhibition ‘GrenzErfahrungen/Borderline Experiences’.