The Real Teatro di San Carlo (Royal Theatre of Saint Charles), its original name under the Bourbon monarchy but known today as simply the Teatro di San Carlo, is an opera house in Naples, Italy. It is located adjacent to the central Piazza del Plebiscito, and connected to the Royal Palace.
It is the oldest continuously active venue for public opera in the world, opening in 1737, decades before both the Milan's La Scala and Venice's La Fenice theatres.
The opera season runs from late January to May, with the ballet season taking place from April to early June. The house once had a seating capacity of 3,285, but has now been reduced to 1386 seats. Given its size, structure and antiquity was the model for the following theatres in Europe.
Commissioned by the Bourbon King Charles VII of Naples (Carlo VII in Italian), Charles wanted to endow Naples with a new and larger theatre to replace the old, dilapidated, and too-small Teatro San Bartolomeo of 1621, which had served the city well, especially after Scarlatti had moved there in 1682 and had begun to create an important opera centre which existed well into the 1700s.
Thus, the San Carlo was inaugurated on 4 November 1737, the king's name day, with the performance of the opera Domenico Sarro's Achille in Sciro, which was based on the 1736 libretto by Metastasio which had been set to music that year by Antonio Caldara. As was customary, the role of Achilles was played by a woman, Vittoria Tesi, called "Moretta"; the opera also featured soprano Anna Peruzzi, called "the Parrucchierina" and tenor Angelo Amorevoli. Sarro also conducted the orchestra in two ballets as intermezzi, created by Gaetano Grossatesta, with scenes designed by Pietro Righini. The first seasons highlighted the royal preference for dance numbers, and featured among the performers famous castrati.