 When Prague revealed its bid book, it moved to a more compact concept to hold the Games in the heart of the city with venues close together - most not more than 20 minutes from each other or from the Old Town Centre of Prague.Three main clusters were organized with the Olympic park at the center.Five venues are already built and ready, 12 would need upgrades and nine permanent new venues would have been constructed with an additional seven venues being temporary for the Games only.