On 28 May 2019, all three Leibniz Institutes situated in Halle (IAMO, IPB and IWH) came together to show their colours for diversity. At their joint stand on the market place, a silhouette artist made portrait cards. Otherwise visible dimensions of diversity, such as age, gender or origin, cannot be reliably read from the silhouettes. Only the essential remains to be seen: We are all different. In addition, passers-by and guests were allowed to lay a mosaic of colorful stones around the Leibniz lettering. The mosaic was intended to symbolise how the participation of different people creates a more colourful and diverse picture, just as research depends on the influences and ideas of very different people.