Complex sentence: Meticulous excavation at the site conducted initially by Patna University (1960-69) and subsequently by Archaeological Survey of India (1972-82) has revealed a huge square monastery with a cruciform stupa in its centre, a library building and cluster of votive stupas.
Split into simpler sentences: Meticulous excavation at the site was conducted initially by Patna University (1960-69) and subsequently by Archaeological Survey of India (1972-82). It has revealed a huge square monastery with a cruciform stupa in its centre, a library building and cluster of votive stupas.