The Sonoma Sister Cities Association (SSCA) was established on September 8, 1986, by official agreement between SCI and the City of Sonoma, as a nonprofit organization to create long-term partnerships between Sonoma and communities in other countries where we have mutual, beneficial interests. Today, SSCA has seven sister city relationships that extend to four continents: Aswan, Chamson, Greve in Chianti, Kaniv, Patzcuaro, Penglai, and Tokaj.