The ARCA exhibition center is housed inside the former medieval church of San Marco. Located in the central nave of the church, "Arca" is a very modern structure in glass and steel designed by the architect Ferdinando Fagnola and used to host events and exhibitions. This innovative parallelepiped has now become one of the city's symbols, as well as a "stylistic code" of the will and ability to combine ancient and contemporary: the crystal vaults of the structure allow you to admire the medieval and majestic ones of San Marco; in turn, the former church is restoring the wonderful hidden fifteenth-century frescoes unveiled by the young restorers of the Conservation and Restoration Center of Venaria Reale to the enjoyment of Vercellesi and tourists.