On 2 September 1954 the International Congress of Mathematicians was opened in Amsterdam. On the initiative of the ICM a large one-man exhibition on Escher was held in the Stedelijk Museum. Amsterdam Professor of Mathematics N.G. de Bruijn, chairman of the organising committee, defended the notion that Eschers work was one of the key connectors between art and mathematics.
The congress and the exhibition proved to be an important impuls for Eschers contacts with mathematicians. Congress attendees visited the exhibition in droves and were deeply impressed by it. In the preface to the catalogue De Bruijn wrote about the playfulness with which Escher takes on mathematics. A key point in understanding what fascinates mathematicians in their work. In the catalogue Escher himself wrote, for the first time really, candidly about his own motives and his position as an artist. This was also the first time he labelled himself as such. During the congress he delivered a speech which was highly succesfull. The congress and the exhibition provided him with many new buyers. More importantly, they brought him friends in the mathematical community.