The Post clavem mural, created in summer 2026 on Via S. Maria in Poschiavo, in the Canton of Graubünden, is inspired by the coat of arms of the Municipality of Poschiavo, depicted on the municipal flag, which features two crossed silver keys on a red background.

The title refers to the Latin expression post clavem, composed of post, meaning “after”, and clavem, meaning “the key”, and can therefore be translated literally as “after the key”. Here, the “key” takes on a metaphorical meaning, becoming a symbol of the Alpine pass, before which the territory of Valposchiavo opens up.