1930 Costești wooden church fire
In 1930, a devastating fire destroyed the wooden church in Costești, AD, a small town in Argeș County, Romania, and killed 118 people, mostly primary school and high school students, the youngest of them being an 8-year-old girl. The event was also known in Romanian press as the Black Easter.
Source: Wikipedia — 1930 Costești wooden church fire (CC BY-SA 4.0)