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The importance of the Mithraeum of Marino lies in its frescoes, the most significant of which is that of Mithras slaying the bull, surrounded by mythological scenes.
Around the relief with Mithras as a bullkiller, a number of scenes from the Mithras Iegend have been painted in the Mithraeum of Dura Europos.
The relief of Mithras slaying the bull at Mauls in Gallia cisalpina is a paradigmatic example of the so-called Rhine-type Tauroctony.