At the entrance to the Kodesh, there were four doors overlaid in gold on both sides of the wall. Two doors were on the side facing the Ulam, and two doors on the side facing the Kodesh. The gate of the Kodesh was locked from the inside by a bolt and it could only be opened from the inside. When the doors to the Kodesh were opened, it was then permitted to slaughter the Tamid - the daily burnt offering. For this was required to be done "facing the tent of the meeting" (Ohel Mo'ed). The mishna relates that the sound of the Great Gate opening could be heard as far away as Jericho. * (Sources: Midot 4:1; Tamid 3:7).  
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Contents:   Part I,    Part II,    Part III,    Part IV,    Part V,    Part VI,    Part VII