Complex sentence: After a fall from grace leading to his resignation as Governor-general in 1651, he regained trust from Frederick III in 1660 and negotiated the Treaty of Copenhagen and worked as lord treasurer and councilor of state until his death in 1666.
Split into simpler sentences: After a fall from grace leading to his resignation as Governor-general in 1651, he regained the trust of Frederick III in 1660 and negotiated the Treaty of Copenhagen. He worked as lord treasurer and councillor of state until his death in 1666.