Naples' downtown Palazzo Reale (Royal Palace) is home to the Biblioteca Nazionale, its priceless treasures including at least 2000 papyri discovered at Herculaneum and fragments of a 5th-century Coptic Bible. Designed by some of Naples' most celebrated 19th-century craftspeople, the Biblioteca Nazionale's beautiful 2nd-floor Biblioteca Lucchesi Palli (Lucchesi Palli Library; closed Saturday) is home to numerous fascinating artistic artefacts, including letters by composer Giuseppe Verdi. You will need photo ID to enter the Biblioteca Nazionale.