Introduction by the Guest Editor

We bring to your attention a special issue dedicated to Christian denominations on the territory of Ukraine. The issue is dedicated to the most difficult periods in the history of Ukraine, namely three wars, two of which were in the 20th century, and the third of which began in 2014 and has been in an active phase since 2022. ...This August issue of OPREE is divided into two parts. The first part contains articles devoted to the period from 1900 to 1945. During this period, the authors from different denominational backgrounds analyze the state of Christian denominations and the challenges they faced in the first part of the 20th century. The second part covers the post-WWII period, and deals with the rapid changes that took place in Ukrainian Christianity after the military attack by the “brother” of the Russian Orthodox Church, which broke out in 2014, pretending at first to be of local significance. Those articles capture the events that are taking place now, giving us and future generations the opportunity to assess the impact of geopolitical processes on Christian denominations in a war