PQ'15 is definitely the past. You are invited to watch several videos as a memory of PQ'15. The author of all videos is Tomáš Jáně.
PQ Talks: Julie Taymor - Playing with Fire
PQ for children
PQ 2015 - Switzerland: Podolí Wave performance
PQ 2015 - Hungary: Donor for Prometheus
PQ 2015 - Opening ceremony
PQ 2015 - Náprstek Museum
PQ 2015 - Hungary: Donor for Prometheus; USA: Vortex of Our Dreams
PQ 2015 - SpaceLab/Zlomvaz: Cumulus (RCSSD, UK)