Original: In 1646, lightning hit the gunpowder tower of the castle, causing an explosion that destroyed parts of the castle and the town, killing Lord Haersolte of Bredevoort and his family, as well as others.
Simplified: In 1646, lightning hit the gunpowder tower of the castle of Bredevoort, causing an explosion that destroyed the castle and the town, killing Lord Haersolte of Bredevoort and his family, as well as others.