The 8th Conference on Aperiodic Crystals - Aperiodic 2015 - is organized under the auspices of the Commission on Aperiodic Crystals of the International Union of Crystallography, and will be held in the Brevnov monastery, Prague, Czech Republic from August 30 to September 4, 2015. The will be the eight of a series of events held triennially since the first Aperiodic in Les Diablerets in 1994. The aim of the conference is to bring together scientists dealing with all aspects of aperiodic crystals and related problems.