What is Christianity's holy building called?

Scripture states (I Corinthians 6:12) that the Christian's body (heart) is the Temple of the Holy Spirit. The Holy Spirit is that part of the Godhead that was promised to believers by Jesus when he returned to his Heavenly Father from his incarnation. Thus for each Christian who believes, repents, confesses and is baptised, the heart is that "special building" to which the questioner refers.