Complex sentence: The oldest part of the minaret, or the main tower, is square in shape, has four galleries, and consists of two different forms of masonry; the base consists of large blocks, while the upper section is built of dressed stone.
Split into simpler sentences: The oldest part of the minaret, or the main tower, is square in shape, has four galleries, and consists of two different forms of masonry. The base consists of large blocks, while the upper section is built of dressed stone.