A fire which killed 78 people - most of them children - will be commemorated in a Cambridgeshire village on Friday.
A plaque will be unveiled to mark the location of the barn in Burwell where the fire broke out on 9 Sepember 1727.
The parish register for 1727 explains how a large number of people had got together in the barn for a puppet show.
The barn's door had been nailed shut behind them, so when the fire started the victims could not escape. Their bodies were buried in two mass graves.
Schoolchildren will read specially composed poems and Cambridgeshire Fire and Rescue Service officers will also attend.
During the commemoration, the church bell ringers will chime the same five bells which were rung when the fire broke out.