Complex sentence: From December 1700 until February 1703 he was Lord Lieutenant of Ireland, although he did not spend much time in that country, and the concluding years of his public life were mainly passed in championing the interests of the Church.
Split into simpler sentences: From December 1700 until February 1703 he was Lord Lieutenant of Ireland, although he did not spend much time in that country. The concluding years of his public life were mainly passed in championing the interests of the Church.