King David
In approximately 1000 B.C.E., King David conquered the Canaanite center called Jebus. Then he built the City of David on the southern slope of Mount Moriah. One of David's first acts after conquering Jerusalem was to bring into the city the Ark of the Covenant which contained the Tablets of the Law.

Thereupon David went and brought up the Ark of God from the house of Oved-edom to the City of David, amid rejoicing. When the bearers of the Ark of the Lord had moved forward six paces, he sacrificed an ox and a fatling. David whirled with all his might before the Lord; David was girt with a priestly garment. Thus David and all the House of Israel brought up the Ark of the Lord with shouts and with blasts of the shofar. (2 Samuel 6:13)

With the transfer of the Ark of the Covenant, Jerusalem became a holy city and the center of worship for the Israelites.