Final answer:
The Sasanians and Byzantines practiced cultural exchange through embassies, shared court rituals, symbolic art and architecture, strategic alliances with Arab tribes, and involvement in Silk Road trade.
Step-by-step explanation:
The Sasanians and Byzantines engaged in cultural exchange despite their often tense and competitive relationship. In times of both peace and conflict, these empires were in regular communication through embassies, shared court rituals such as gift exchanges and witnessed each other's processions and games. Symbolic communication was evident in their art and city planning, with both capitals, Constantinople and Ctesiphon, acting as symbols of imperial power. Exchanging gifts and observing rituals were key aspects of their interactions, acknowledging each other's rulership and right to exist. Furthermore, the strategic alliances with Arab tribes and participation in the broader economic network via the Silk Road were essential components of their diplomatic and trade relations.