The entrance was 20 cubits tall, 10 cubits wide: Eruvin 2a
The purpose of the Heichal's doors was to create privacy within: Eruvin 2b
The design atop the doorway: Eruvin 2b-3a
Placement of the initial, temporary walls, which were made of interwoven segments: Megillah 10a Personal benefit from the Inner Room: Pesachim 26a
The purpose of the room is internal, and so benefit from shade cast externally shouldn't be a problem of Illegal Use of Sanctified Property: Pesachim 26a
On the 17th of Tammuz an idol was set up [by the Jews] in this room: Taanit 26b
The arrangement of an idol, by Jews, in this room, was a major cause for the downfall of the Jews: Gittin 7a
The Babylonians entered this room on the 7th of Av, in the Destruction of the First Temple: Taanit 29a
The Roman "Turnus Rufus" plowed over this room: Taanit 29a
The sources for the maximum size measurements of the entrance to an alley in which one may carry on Shabbat are the dimensions of the entrance to the "Heichal" room of the Temple or the "Ulam [Azarah]" room of the Temple: Eruvin 2a-3a
The relative sanctity of various areas of the heichal and the azarah: Zevachim 14a
The north-south position of the entrance from the heichal into the azarah: Zevachim 53a-b
Removing an [impure] crawling creature found in this room during Shabbat: Eruvin 104b-105a
King David sanctified the floor of the azarah and heichal in the Beit haMikdash: Tosafot Zevachim 24a "Hoil"
