This is a great link to Adoremus Bulletin written by Helen Hull Hitchcock. In this article, Helen explains the importance of placing the tabernacle in the sanctuary. Check it out!

http://www.adoremus.org/7-899Tabernacle.html

Online Edition - Vol. V, No. 5: July/August 1999

Article Name:
"They have taken away my Lord,

and I know not where they have laid Him"
by Helen Hull Hitchcock

Click on Architecture at the Bottom of Helen's Ariticle for More Info