Complex sentence: The gallery at the top, is a round tapered and corbelled base that houses the 12 sided polygonal Fresnel lantern, which includes three rows of rectangular glass panes, the Fresnel lantern unique in design was manufactured by the Louis Saulter Company of Paris.
Split into simpler sentences: The gallery at the top, is a round tapered and corbelled base that houses the 12 sided polygonal Fresnel lantern, which includes three rows of rectangular glass panes. The Fresnel lantern unique in design was manufactured by the Louis Saulter Company of Paris.