Complex sentence: The new cathedral was built using travertine, a stone found in abundance around Roskilde Fjord, as a basilica in Romanesque style with half-rounded interior arches to support the flat interior ceiling, and two towers flanking the west front entrance.
Split into simpler sentences: The new cathedral was built using travertine, a stone found in abundance around Roskilde Fjord. It was constructed as a basilica in Romanesque style with half-rounded interior arches to support the flat interior ceiling, and two towers flanking the west front entrance.