of Zoroastrianism, water in art grew increasingly important. This trend manifested itself in garden design, with greater emphasis on fountains and ponds in gardens. During the Umayyad and Abbasid periods, the aesthetic aspect of the garden increased in importance, overtaking utility. During this time, aesthetic rules that govern the garden grew in importance. An example of this is the chahār bāgh (), a form of garden that attempts to emulate the Abrahamic notion of a Garden of Eden, with four rivers and four quadrants that represent the world. The design sometimes extends one axis longer than the cross-axis and may feature water channels that run through each of the four gardens and connect to a central pool. Under the Abbasid dynasty (8th century AD), this type of garden became an integral part of representational architecture. The Persian garden is a landscape garden, designed individually and created intentionally as a space embedded in the aesthetic and spiritual context of its past and contemporary cultural, political, and social environment. Hallmarks of these formal gardens are a geometric layout following geometric and visual principles, implemented to nature by water channels and basins which divide the enclosed space into clearly defined quarters, a principle that has become known as Chahar Bagh (four gardens), waterworks with channels, basins, fountains and cascades, pavilions, prominent central axes with a vista, and a plantation with a variety of carefully chosen trees, herbs. and flowers. The old-Iranian word for such gardens "pari-daizi' expresses the notion of an earthly paradise that is inherent to them. As such, they are a metaphor for the divine order and the unification and protection of the ones who do good. Their counterparts on earth fulfill a similar function. These principles are brought to perfection in the gardens of the emperor as the "good gardener". Notwithstanding a formal standardization, the landscape gardens also reflect diversity and development, bound to function, regional and chronological characteristics, as well as technological, know how personal preferences, ambitions, and demands. Persian gardens are multi-functional: they not only serve contemplation and relaxation, but are also a representation and manifestation of power. Designing and implementing a garden demonstrates the occupation of land, holding audiences and celebrating victories or marriages in these gardens signal superiority, or social and political bonds. Starting from the 12th to 13th century, tombs for members of the royal family or important personalities were placed into such formal gardens,