death_date death_place birth_place nationality birth_date significant_buildings article_title name
30 september 2007 cologne , germany kaisersesch , germany german 12 july 1926 messe torhaus , frankfurt wallraf-richartz museum , cologne oswald mathias ungers
 oswald mathias ungers
oswald mathias ungers

oswald mathias ungers -lrb- july 12 , 1926 -- september 30 , 2007 -rrb- was a german architect and architectural theorist , known for his rationalist designs and the use of cubic forms .
among his notable projects are museums in frankfurt , hamburg and cologne .
