Complex sentence: The first structure in a $2 million long-term building plan was erected, with subsequent buildings completed at intervals over the next two decades, the most notable building being the Manufacturers and Liberal Arts Building, now the Center of Progress Building.
Split into simpler sentences: The first structure in a $2 million long-term building plan was erected, with subsequent buildings completed at intervals over the next two decades. The most notable building being the Manufacturers and Liberal Arts Building, now the Center of Progress Building.