And having an high priest over the house of God; High priest, х hierea (G2409) megan (G3173)]. A different term х archiereus (G749)] is used always in this letter for "high priest." Translate, 'A Great Priest:' one at once King and "Priest upon His throne" (Zechariah 6:13): a royal Priest, and a priestly King.
House of God - the spiritual house, the Church, made up of believers, whose home is heaven, where Jesus, their Head, now is (Hebrews 12:22-23). Thus heaven is included, as well as the Church, whose home it is.