1796-1865. German Lutheran theologian. He was deeply influenced by Schleiermacher* and Neander* and served as professor of theology in Heidelberg University from 1821, with the exception of a seven-year interlude at Halle (1829- 36). Ullmann was the leading advocate of the theology of mediation (Vermittlungstheologie) and in contrast to rationalism he stressed the significance of salvation through Jesus. He also occupied several posts in the Baden church, including director of the consistory (1856-61). He tried to influence the Baden church in the direction of Pietism by introducing changes in the confession, order of worship, and catechism, and this led to his overthrow by liberals. In 1848 he assisted in founding the German Evangelical Kirchentag.