Then they celebrated Mass to consecrate the location .
On July 4 , 1823 , the soldiers placed a large redwood cross on the place in the Sonoma Valley where they expected the new Mission San Francisco de Assis to be established .
Then soldiers celebrated Mass to consecrate the location .
On July 4 , 1823 , the soldiers placed a large redwood cross on the place in the Sonoma Valley where they expected the new Mission San Francisco de Assis to be established .