Complex sentence: She died in giving birth to him and his father began travelling Europe for consolation, gathering famous collections of paintings and sculptures and marrying again, to Marie Anne de Hohenlohe-Waldenburg-Bartenstein, on 22 August 1784.
Split into simpler sentences: She died in giving birth to him and his father began travelling Europe for consolation, gathering famous paintings and sculptures into a notable collection. He married again, to Princess Marie Anne of Hohenlohe-Waldenburg-Bartenstein, on 22 August 1784.