The King's High Priest
The Kingdom of God (see The Kingdom Of Heaven - On Earth) is so-named because God is the King of His Kingdom. The High Priest of the Kingdom of God is The Christ (see What Is Jesus Christ Doing Right Now?). All of the Levitical sacrifices, instituted by Christ (see 'The God Of The Old Testament' and 'Before Abraham Was, I AM'), were created as a living prophecy of the sacrifice that Christ Himself would fulfill to the King.
"8:1 Now of the things which we have spoken this is the sum: We have such an high priest, who is set on the right hand of the throne of the Majesty in the heavens" (Hebrews 8:1 KJV)
"Thus did Urijah the priest, according to all that king Ahaz"
Over the centuries, humans have made numerous mock perversions of Christ's High Priesthood before God The King, whereby a human king created his own "high priest" to serve his self-righteous and self-serving invented or corrupted religion. The papacy is a prime example; the bishop of Rome was merely the Emperor of Rome's local bishop (that's why it's called the Church of Rome, or the Roman Catholic Church) - the "pope" became more powerful than the many other local bishops of the Roman empire's religion (see Ancient Empires - Rome) because he was the personal "high priest" and "prophet" of the king of Rome (see and Emperors and Popes and The Little Big Horn).
Israel also had numerous occurrences when the high priest (who was supposed to serve as a prefigure of Christ; again, see What Is Jesus Christ Doing Right Now?) became a mere obedient stooge of a corrupt king. Urijah, a high priest in the time of King Ahaz of Judah (see also Kings of Israel and Judah), is a prime example. Urijah built an idolatrous altar, like one that Ahaz had seen at Damascus, and blasphemously set it up in the LORD's Temple, removing some of the prescribed holy items to make room to do so.
"16:10 And king Ahaz went to Damascus to meet Tiglathpileser king of Assyria [see Ancient Empires - Assyria], and saw an altar that was at Damascus: and king Ahaz sent to Urijah the priest the fashion of the altar, and the pattern of it, according to all the workmanship thereof. 16:11 And Urijah the priest built an altar according to all that king Ahaz had sent from Damascus: so Urijah the priest made it against king Ahaz came from Damascus. 16:12 And when the king was come from Damascus, the king saw the altar: and the king approached to the altar, and offered thereon. 16:13 And he burnt his burnt offering and his meat offering, and poured his drink offering, and sprinkled the blood of his peace offerings, upon the altar. 16:14 And he brought also the brazen altar, which was before the LORD, from the forefront of the house, from between the altar and the house of the LORD, and put it on the north side of the altar.
Fact Finder: What king and his obedient "high priest" are going to cause the prophesied "abomination of desolation"?