"One of the most significant accomplishments of David's reign was the establishment of Jerusalem as his royal city and the nation's capital. The site was first occupied in the third millennium B.C. and was a royal city in the time of Abraham. It was located on the border between Judah and Benjamin but was controlled by neither tribe. At the time of the conquest both Judah and Benjamin had attacked the city, but it was quickly lost again to the Jebusites (Jos 15:63) and was sometimes referred to by the name Jebus (see Jdg 19:10; 1Ch 11:4). The city David conquered covered somewhat less than 11 acres and could have housed not many more than 3,500 inhabitants. By locating his royal city in a newly conquered town on the border between the two segments of his realm, David united the kingdom under his rule without seeming to subordinate one part to the other." (The NIV Study Bible notes, 2 Sam. 5:6)
