The article focuses on the problem of denominationally mixed marriages in the Helvetian Church in Bohemia and Moravia at the turn of the nineteenth and the twenti eth century. The problem is studied, on the one hand, for the whole Church on the basis of yearly reports of official performances for the years 1900-1914, and on the other for the Protestant parish Velim on the basis of the register of marriages for the years 1891-1914. Besides the share of denominationally mixed couples the article also pays attention to the numerical development of the Choir in Velim in the general context of development of the Helvetian church as such., Markéta Pražáková Seligová., and Obsahuje seznam literatury