Mission San Francisco Solono, the last of the California's 21 missions, stands opposite the North East corner of the Plaza in Sonoma. The site was selected and consecrated by Father Jose Altimira in July 1823. The site provided all of the basic needs for the mission. Water, wood, stone and other building materials were readily available and the rich soil conditions and warm climate were promising for agriculture. In 1825, the first building was completed. A low wooden structure plastered inside and out with whitewashed mud, it was used as living quarters. This building has been reconstructed and stands near the present chapel. It is the oldest building in Sonoma.
The mission reached its peak of prosperity around 1830 when nearly 1,000 Indians were in residence. In 1841, General Vallejo constructed and furnished the present Mission Chapel in order to provide a Parish Church for the people of Sonoma.
The Mission buildings became State Historical Landmarks and state property in 1906. Today they are open to the public daily 10am to 5pm. Admission varies between state properties, but most charge an admission fee of $1-$2 for those over 17 years of age. Donations are always welcome.