he Lithuanian Trinitarian formula includes within it the word God. It is supposed that Lithuanians received this parenthesis from the Teutonic Order as early as the Baptism of King Mindaugas. The author of this present study has focused his attention on German liturgical texts used in the Baltic region in the sixteenth and seventeenth centuries. Analysis of these documents indicates that the parenthesis God was included in the Trinitarian formula in almost every German liturgical book, and this suggests that such a formula may well have been used among the Baltic Germans before the Reformation. The author supports the thesis of those scholars who suggest that Lithuanians in the Grand Duchy as well inherited the use of the word God in their formula from the Teutonic Order.