Byzantine gardens were based largely on Roman ideas emphasizing elaborate Hellenistic mosaic designs, a typical classical feature of formally arrayed trees and built elements such as fountains and small shrines. These gradually grew to become more elaborate as time passed. Byzantine gardens have influenced Islamic gardens and particularly Moorish gardens; the latter being because Spain was for centuries a Roman province (and, during the reign of Justinian the Great, a Byzantine province as well).
Study
Little else is known about Eastern Roman gardens and very few references, let alone entire treatises, exist on the subject. The Eastern Romans, like their Greco-Roman predecessors, attached great importance to matters of aesthetics. However, ancient Greek and Roman gardens were more developed and better documented.
Later Greek rule
During the last 250 years of Greek rule ending in 1453, conditions drastically curtailed the tradition, which stretched back to Hellenistic times, of building luxurious villas, mostly outside the cities, with pleasing gardens, as appear in mosaics and frescoes or are recorded in texts. This period seems to have been less thoroughly investigated than have most earlier periods, and a concentration on it should produce a more coherent picture than another attempt to cover the whole span of Byzantine history.