September 17, 1179: Hildegaard of Bingen, a German abbess, mystic, author, and preacher who received visions of God from the age of 5, dies at age 82 (see issue 30: Woman in the Medieval Church).
September 17, 1575: Swiss reformer Heinrich Bullinger dies. Next to John Calvin, Bullinger exerted the most influence over the second-generation Reformers (see issue 12: John Calvin).
September 17, 1630: English settlers change the name of Trimountain, Massachusetts, to Boston in honor of pastor John Cotton, formerly of St. Botolph's Church in Boston, England.
September 17, 1776: 247 Spanish colonists consecrate their California mission of San Francisco, today a city of 725,000 (see issue 35: Christopher Columbus).