The Mikdash is built of three parts: The Ulam (Hall); the Kodesh (the Holy area) also known as the Heichal, and the Kodesh Kodashim, the Holy of Holies. Together they are all called the Heichal (according to the Rambam's Laws of the Beit Habechira). On the sides of the Heichal was a series of small compartments, whose purpose is not explained in the texts.  
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Contents:   Part I,    Part II,    Part III,    Part IV,    Part V,    Part VI,    Part VII