richmahn_en_tn/dan/11/45.md

561 B

the tent of his royal residence

This refers to the king's luxurious tents that he lived in when he was with his army in time of war.

between the seas and the mountain of the beauty of holiness

This probably refers to the region between the Mediterranean Sea and Temple Mount in Jerusalem.

the mountain of the beauty of holiness

This refers to the hill in Jerusalem where God's temple was. See how you translated somewhat similar phrases in Daniel 9:16 and Daniel 9:20. (See: rc://en/ta/man/translate/figs-metonymy)