The Cyrillic Alphabet was developed by the Slavic missionaries Cyril and Methodius, who were sent by the Byzantine Empire to spread Christianity among the Slavic peoples. It was not a direct contribution of the Byzantine Empire itself.

The Hagia Sophia was built in Constantinople, the capital of the Byzantine Empire, during the reign of Emperor Justinian I. It is considered one of the greatest examples of Byzantine architecture.

Justinian I, also known as Justinian the Great, is credited with compiling the Justinian Code, which became the foundation of law in the Byzantine Empire and influenced legal systems in Europe for centuries.

The Byzantine Empire preserved and transmitted the knowledge and culture of the ancient Greek civilization, including its philosophy, literature, art, and science.

Empress Irene is known for her support of iconoclasm, which led to a period of religious controversy and conflict in the Byzantine Empire.

Byzantine mosaics are primarily made of small pieces of colored glass, which are arranged to form intricate designs and images.

The Byzantine Empire's strategic location made it a hub for trade between Europe and Asia, facilitating the exchange of goods and ideas.

Emperor Theodosius II oversaw the construction of the Theodosian Walls, which were designed to protect Constantinople from invasions.

The Great Schism of 1054 led to the separation of the Eastern Orthodox Church and the Roman Catholic Church.

The concept of zero as a number and its use in mathematical operations was developed by the Indian mathematician Brahmagupta, whose work was later transmitted to the Byzantine Empire.

St. Mark's Basilica in Venice is a prime example of Byzantine architecture, showcasing the influence of the Byzantine Empire on Western art and architecture.

The Justinian Code, compiled under Emperor Justinian I, was a comprehensive collection of Roman law that influenced legal systems across Europe.

Basil II, also known as 'Basil the Bulgar-Slayer,' was a Byzantine emperor who expanded the empire's territories through successful military campaigns.

The Byzantine Empire played a crucial role in preserving and transmitting the works of Aristotle, whose philosophical ideas influenced Western thought.

Emperor Justinian I commissioned the construction of the Hagia Sophia, an architectural masterpiece that showcased the Byzantine Empire's artistic and engineering prowess.