Answer:

Byzantine architects were eclectic, at first drawing heavily on Roman temple features. Their combination of the basilica and symmetrical central-plan (circular or polygonal) religious structures resulted in the characteristic Byzantine Greek-cross-plan church, with a square central mass and four arms of equal length.

Combining features of Roman and Byzantine buildings and other local traditions, Romanesque architecture exhibits massive quality, thick walls, round arches , sturdy piers , groin vaults , large towers, and symmetrical plans. The art of the period was characterized by a vigorous style in both painting and sculpture.

While the Gothic style can vary according to location, age, and type of building, it is often characterized by 5 key architectural elements: large stained glass windows, pointed arches, ribbed vaults, flying buttresses, and ornate decoration