Isaiah 60:13

The glory of Lebanon... — The prophet sees in the new Jerusalem a revival of the glories of the days of Solomon. The cedars of Lebanon, and other trees of the forest, are to furnish timber for its buildings, or even to be planted in the courts of the Temple, or in its open places and streets (Psalms 52:8; Psalms 92:12; Isaiah 35:2).

The box is probably, as in Isaiah 41:19, a species of cedar.

The place of my feet is clearly parallel with the “sanctuary” of the previous clause. So the word “footstool” is used of the Temple in Psalms 99:5; Psalms 132:7.