The “tower of David” may be that mentioned in Nehemiah 3:25-27; Micah 4:8. For the custom of hanging shields and other weapons in and upon buildings suited for the purpose, see Ezekiel 27:10-11.
Related Commentaries of Song of Solomon 4:4
Song of Solomon 4:4
4 Thy neck is like the tower of David builded for an armoury, whereon there hang a thousand bucklers, all shields of mighty men.