'City of David' in the Bible

So David slept with his fathers, and was buried in the city of David.

And Solomon made affinity with Pharaoh king of Egypt, and took Pharaoh's daughter, and brought her into the city of David, until he had made an end of building his own house, and the house of the LORD, and the wall of Jerusalem round about.

Then Solomon assembled the elders of Israel, and all the heads of the tribes, the chief of the fathers of the children of Israel, unto king Solomon in Jerusalem, that they might bring up the ark of the covenant of the LORD out of the city of David, which is Zion.

Here is a summary of the conscripted labor that King Solomon required to build the LORD's Temple, his royal palace, the terrace ramparts in the City of David, the wall of Jerusalem, Hazor, Megiddo, and Gezer.

But Pharaoh's daughter came up out of the city of David unto her house which Solomon had built for her: then did he build Millo.

And this was the cause that he lifted up his hand against the king: Solomon built Millo, and repaired the breaches of the city of David his father.

And Solomon slept with his fathers, and was buried in the city of David his father: and Rehoboam his son reigned in his stead.

And Rehoboam slept with his fathers, and was buried with his fathers in the city of David. And his mother's name was Naamah an Ammonitess. And Abijam his son reigned in his stead.

And Abijam slept with his fathers; and they buried him in the city of David: and Asa his son reigned in his stead.

And Asa slept with his fathers, and was buried with his fathers in the city of David his father: and Jehoshaphat his son reigned in his stead.

And Jehoshaphat slept with his fathers, and was buried with his fathers in the city of David his father: and Jehoram his son reigned in his stead.