This splendid house, situated on the eastern side of the Via di Mercurio, was excavated between 1826-28 and again in 1937. It was named after the frescoes in the fauces (entance hall) featuring the Dioscuri, the twin sons of Zeus, Castor and Polydeuces (Pollux). The house is also sometimes referred to simply as the House of Castor and Pollux.
The fauces were decorated in the fourth style on a red ground with individual frescoes of the twins, Castor and Pollux (one is pictured above).

I have included some of the frescoes that are in the National Archeological Museum, Naples such as the Dioscuri, Perseus & Andromeda & Medea