Complex sentence: He became well known for his innovative architectural proposals, including a collapsible house (1955), the Cardboard House and the Plastic House (1960) near the end of the 1950s, his chair designs became much more unconventional, with no legs or discernible back.
Split into simpler sentences: He became well known for his innovative architectural proposals, including a collapsible house (1955), the Cardboard House and the Plastic House (1960). Near the end of the 1950s, his chair designs became much more unconventional, with no legs or discernible back.