To make the citizens believe in the power and strength of their rulers and gods.
Versailles
The monarchs of the Tudor Dynasty had numerous palaces all throughout England.
The Mycenaean places were held as tombs for the Mycenaean's.
The Saudi kings are absolute monarchs with the power of life and death over their subject populations. Who knows how much of the money from oil they keep for themselves. It's obviously plenty since they all have luxurious palaces, big yachts, private jets, herds of servants, all the bells and whistles of tyrants.
The Palace of Versailles became the model for the palaces of subsequent absolutist monarchs. Built during the reign of Louis XIV in France, its grandeur and opulence symbolized royal authority and the divine right of kings. The design and layout of Versailles influenced many European rulers, who sought to emulate its architectural splendor and centralized power within their own realms. This trend established a standard for royal residences that emphasized both luxury and political control.
As the Palaces Burn was created in 2002.
The palace of Versailles is one of the biggest, and arguably one of the most beautiful palaces in the world. It has come to represent the system of absolute monarchy of old France.
Twenty Palaces was created in 2009-09.
Vienna, Austria is known to have the most palaces in a single city. The city is home to numerous stunning palaces, including the famous Schönbrunn Palace and Hofburg Palace. These palaces showcase the rich history and grandeur of the city.
Most monarchs lived in palaces. In fact, in some places the word palace was used for the home of the monarch, regardless of what the structure was otherwise. So if a monarch took up residence in a manor house or a castle or an abbey, that building became the palace, until he moved to some other place. In practice, for most of the Middle Ages, the palace was a very fine residence with the offices and other facilities needed to support the activities of a monarch. In some cases, the monarch lived in a castle, but since castles tended to be uncomfortable, as they were designed primarily for defense rather than comfort, the times when monarchs lived in castles tended to be the times when there was war or unrest. There is a link below to a related question on palaces, and there are links to pictures there.
Kublai Khan built palaces in China.
Egyptian palaces are made of mud and stone