בגדר מצות עשיית ארון
HaRav Zvi Einstadter shares a beatiful biur in machlokes Rambam and Ramban regarding the purpose of aron, and explains why they did not make a new aron in the second Beis HaMikdash.
Questions and comments on the shiur can be emailed to alumnishiur@nirc.edu. To see this shiur in print, look in HaRav Zvi Einstadter’s sefer Maor Mordechai on parshas Terumah.