The night of August 24, 1572, is known as the Massacre of St. Bartholomew. In France a religious war is raging. In order to impose peace a forced wedding is arranged between Margot de Valois, sister of the immature Catholic King Charles IX, and the Hugenot King Henri of Navarre. Catherine of Medici maintains her behind-the-scenes power by ordering assaults, poisonings, and instigations to incest.
This movie contains 3 potentially triggering events.
A dog is kicked and cries out in pain from 1:34:25-1:34:30 and again from 1:59:15-1:59:20. A man shoots a horse in the knee while aiming for a boar (the boar hunt is from roughly 1:38:50-1:43:00).
Catherine slaps Margot in the face. One of Margot's brothers slaps her in the face, then he and the other brothers strip and manhandle her from 2:02:25-2:03:50. She has bloody scratches on her chest from it.
During a hunt a horse falls on top of the king and someone shoots it when aiming for a wild boar. It doesn't die on screen, but it is lightly implied that they will kill it since it can no longer walk.
There is a *lot* of blood. There are many battles with stabbings and several throats get cut. The king also gets poisoned causing him to cough up and sweat blood.