Complex sentence: The third floor is built in traditional Chinese "chán" (Jpn. zen) style, also known as "zenshū-butsuden-zukuri" and called the "Cupola of the Ultimate".
Split into simpler sentences: The third floor is built in traditional Chinese "chán" (Jpn. zen) style, also known as "zenshū-butsuden-zukuri". It is called the "Cupola of the Ultimate".