Complex sentence: During his lifetime, Andreas was believed to have wasted enormous sums of money given to him by the Pope; however, modern historians now believe that the money received from the Pope was only enough for a meager standard of living.
Split into simpler sentences: During his lifetime, Andreas was believed to have wasted enormous sums of money given to him by the Pope. However, modern historians now believe that the money received from the Pope was only enough for a meager standard of living.