50 Euro (2021) in gold (0,999) commemorating the Cultural Heritage / Portara of Naxos. The gate of the temple of Apollo (Portara) on obverse. Inside slab by NGC "PF 70 ULTRA CAMEO / Portara Naxos". Cert number: 5785161-013. Accompanied by its official wooden case of issue with CoA with no "891". (Hellas CE.121).