Complex sentence: Concini's wife, Leonora, was arrested, imprisoned in Blois and accused of sorcery and sent to beheading and to subsequent burning her body at the stake on July 8 of the same year in Place de Grève, Paris.
Split into simpler sentences: Concini's wife, Leonora, was arrested, imprisoned in Blois and accused of sorcery. She was beheaded and her body subsequently burned at the stake on July 8 of the same year in Place de Grève, Paris.