There are many causes to the decline of the Byzantine Empire.
They had many civil wars, two of which really shook up the country.
The Ottoman Turks were super strong and were expanding very rapidly, looking to Constantinople as the "City of World's Desires"
Their system for administration worked when the Empire first took root, but quickly became outdated.
The shift from hunting and gathering to farming changed the life and cultures of the Native Americans greatly.
Once they started with the farming, the Native Americans started to have a settled life. That meant the building of permanent houses, and the abandoning of the constant migrations throughout the countryside.
The fact that they started to produce enough food for themselves and also have reserves, meant that they also had more time to focus on other things. They started to create pottery, to develop the art, live more peaceful lives.
That was a big step forward compared to the hunter-gatherer lifestyle and culture, which was mostly based on survival from day to day, as well as constant battles for better hunting grounds with other tribes.
Answer:
To prove his talent, Michelangelo made his first masterpiece, the Pieta del Vaticano. The classical perfection of the figures astonished his contemporaries. In 1501 the artist returned to his hometown
The Seljuks were invading
