A manuscript entitled Choral-Lieder zu dem Glocken-Spiel der Altstädtschen Ober-Pfarr-Kirche zu St. Catharinen ausgesetzt mit Variationes, dated 1784 and containing pieces for the Saint Catherine’s church carillon, is kept in the State Archive in Gdansk. The manuscript contains 260 compositions based on a protestant chorale. They are grouped in two sections entitled Lieder zur ganzen Stunde and Lieder zur halben Stunde, i.e. songs for playing at full and half hours. In all, the manuscript contains 130 three-minute compositions to be played at full hours and 128 ninety-second compositions to be played at half hours. The fi rst part of the manuscript also contains two 15-second quarter-hour preludes. The works were written by Johann Ephraim Eggert, a St. Catherine’s church carillonist. The paper discusses the structure of the compositions. Despite what the title suggests, not all compositions are in the form of variations. Of the 130 pieces designated to be played at full hours, 124 are indeed variations, but there are 5 in the form of chorale prelude, and 1 is a simple monophonic chorale. As for the half hour compositions, about 25% are variations and the remaining ones are chorale preludes. The author of the article presents characteristic features of Eggert’s compositions. Discussing variations, she examines the ways of presenting the themes, texture, variation technique resources, and also types of variations. In the chorale preludes, she focuses on the ways of treatment. The author also points to the fact that the forms of Eggert’s compositions and his use of technical resources result from the carillon’s design.