Answer;
-Reconquering lost lands
Explanation;
-Justinian was an energetic Byzantine emperor who had been born into a poor family and listened to the ideas of all his subjects whether they were wealthy nobles or poor peasants who's rule began in 527 A.D.
-Justinian's code was an organised collection and explanation of the Roman laws, it is important because it became the basis for legal systems of most modern european countries.
-Among his accomplishments; he built the Hagia Sophia Cathedral, but later collapsed due to an earthquake and a flaw in the architecture, he also attempted to reconquer land that Rome had lost over the years.