In 1985 the traditional Arbeitstagimg at Bonn was cancelled. Instead a number of workshops were organized during Spring and Summer 1985 by various organizers. One of these workshops was on number theory with special emphasis on diophantine problems and transcendence. It took place at the Max-Planck-Institut fur Mathematik at Bonn in May - June 1985. A great number of leading mathematicians in the subject were invited for a certain period to discuss mathematics and problems. It seems that a very fruitful atmosphere was created which is reflected by quite a number of joint papers which were written during this time at Bonn or at least initiated there.