San Gabriel Arcangel, founded in 1771 by Father Jun pero Serra and the fourth in the California chain of 21 missions. It was moved  4.5 miles (7 km) to its present site in 1775. The fortress like mission   church  enormous walls are five feet thick and the mortar used in their   construction has rendered them almost as solid as if hewn from rock.  Mission San Gabriel must have had twenty thousand acres under  cultivation, and , in 1820, this Mission alone possessed one hundred   and sixty thousand vines, two thousand three hundred trees, twenty-five  thousand head of cattle, and fifteen thousand sheep. By the treaty   between the United states and Mexico, San Gabriel Mission allowed  to retain all lands that was cultivated. Out of those twenty thousand acres, one hundred and fifty are all that left. 
 by Maria Hetenyi