Complex sentence: On Cotroceni hill, in 1679 Şerban Cantacuzino built a monastery and this was the place where a palace was built by French architect Paul Gottereau for King Carol I of Romania in 1888.
Split into simpler sentences: On Cotroceni hill, in 1679, Şerban Cantacuzino built a monastery. This was the place where a palace was built by French architect Paul Gottereau for King Carol I of Romania in 1888.