This report discusses an attempt of Pope Alexander VII to incorporate the Swiss Catholic cantons in alliance with Venice against the Ottomans in 1666. Venice was at that time in an exhausting war with the Ottoman Empire because of Crete. This war has hindered the position of the St. Mark republic, particularly its business, which was based fairly on a trade with the Ottoman state. Crete was an important trading destination in the Mediterranean and the only remaining stronghold of Venice in the East. The Swiss did not join this alliance and Venice had lost Crete in a peace accord which they signed in 1669.