Strasbourg Reformer (1491-1551) and one of the most consequential mediating figures between the Lutheran and Reformed branches of the Reformation. Born at Sélestat in Alsace; entered the Dominican Order as a teenager; trained at Heidelberg in scholastic theology; attended the Heidelberg Disputation (1518) where Luther's presentation converted him to Reformation views. Released from his Dominican vows; married Elisabeth Silbereisen (1522, one of the earliest Reformed clerical marriages). After serving briefly at Wissembourg, Bucer was called to Strasbourg in 1523 where he served as principal pastor and Reformer for the next twenty-five years (1523-1549). Bucer's Strasbourg ministry was characterized by (1) the establishment of a thoroughly reformed church-and-school structure; (2) extensive mediating labor between Lutherans and Reformed (the Tetrapolitan Confession 1530; the Wittenberg Concord 1536 attempting Lutheran-Reformed agreement on the Lord's Supper); (3) hosting and discipling refugee Reformers (including Calvin during his 1538-1541 Strasbourg exile); (4) producing extensive theological writings (commentaries on Romans, Ephesians, and the Gospels; the De Regno Christi, his great work on Christian-civil government). After Strasbourg accepted the Augsburg Interim (1548, the Catholic Habsburg-imposed settlement following the Schmalkaldic War defeat), Bucer refused conformity and accepted Cranmer's invitation to England. Bucer served as Regius Professor of Divinity at Cambridge from 1549 until his death in 1551; influenced Cranmer's revision of the Book of Common Prayer for the 1552 second edition; produced his great unfinished work De Regno Christi for King Edward VI. Bucer's influence on Calvin, on the second Book of Common Prayer, and on the broader Reformed tradition makes him one of the most consequential second-tier Reformers.