What were the major achievements of the Byzantine Empire?

The Byzantine Empire was a continuation of the Roman Empire that endured for nearly 1,000 years, from 330 AD to 1453 AD. During that time, the Byzantine Empire achieved many notable accomplishments, including:

• Preservation of Greek and Roman Culture: The Byzantine Empire helped preserve many of the cultural achievements of the ancient Greeks and Romans, including art, literature, and philosophy. Byzantine scholars translated and preserved many ancient Greek and Roman texts that might have been lost otherwise.
• Justinian's Code: The Byzantine Emperor Justinian I established a legal code that became the basis for many legal systems in Europe. Justinian's Code was a comprehensive set of laws that codified Roman law and was in use in the Byzantine Empire for centuries.
• Architecture: The Byzantine Empire was known for its magnificent architecture, including the Hagia Sophia, a massive cathedral that was the largest building in the world for nearly a thousand years. Byzantine architects also developed new building techniques, such as the use of pendentives to create domes.
• Military: The Byzantine Empire maintained a powerful and well-trained military, which allowed it to withstand attacks from many enemies over the centuries. The Byzantine Empire was able to maintain its independence and defend its borders for nearly 1,000 years.