For travellers under 30, the European Youth Card (www.eyca.org) is widely accepted.
At many state museums and archaeological sites, EU citizens under 18 enter free, and those aged between 18 and 25 get a 50% discount. To claim these discounts you officially need a passport, driving licence or ID card as proof of age and nationality; non-EU citizens are technically ineligible for discounts, although some ticket-takers are more lenient than others in enforcing these rules.
The ‘reduced’ rate in our prices refers to the student discount. Since 2014, discounts for seniors have been significantly scaled back at state-run sites.
At private museums, children under 18 usually receive some kind of discount, with young children often entering free of charge.