As you walk outside the metro stop S. Ambrogio, the first turn you take for left on Via Edmondo de Amicis leads you to a narrow street barely blocked by two cement cylinders holding a chain. As you walk around them, you'll approach this an ear on the side of a building.

At first, it seems like a modern interpretation of famous Casa Sola-Busca, or House of the Ear, which holds a bronze ear sculpture from 1930. The bronze ear served as a primitive intercom, a device that allowed communication between arriving guests and the household. However, this yellow ear has a different and rather vague history.

It is thought to be a work of art from Urbansolid, a group of artists who adorn the city with sculptures of brains along with wifi symbols, naked bodies emerging from walls, colored faces and, you guessed it: ears.