Zechariah 9:3

“And Tyrus did build herself a strong hold, etc.] Tyre was built upon a rock, and was a strong fortress itself, from whence it had its name; and, besides its natural defence, it had a wall one hundred and fifty feet high, and its breadth was answerable to its heightf174; but yet, as it could not defend itself against Alexander the great, who took it; so neither against the Gospel of Christ, which found its way into it, and was mighty to pull down strong holds in a spiritual sense: and heaped up silver as the dust, and fine gold as the mire of the streets; the riches of these cities, especially Tyre, are often made mention of; they were famous for their wealth, being places of great trade and…”

“The heathen historian, DIODORUS SICULUS [17.40], confirms this. "Tyre had the greatest confidence owing to her insular position and fortifications, and the abundant stores she had prepared." New Tyre was on an island seven hundred paces from the shore. As Isaiah's and Ezekiel's (Eze. 27:1-36) prophecies were directed against Old Tyre on the mainland and were fulfilled by Nebuchadnezzar, so Zechariah's are against New Tyre, which was made seemingly impregnable by a double wall one hundred fifty feet high, as well as the sea on all sides.”

“And Tyre did build herself a stronghold - She built it for herself, not for God, and trusted to it, not to God, and so its strength brought her the greater fall. The words in Hebrew express yet more. “Tyre” (Zor) literally, “the rock,” “built herself mazor, tower,” a rock-like fort, as it were, a rock upon exceeding strength, binding her together. . “The walls, 150 feet high and of breadth proportionate, compacted of large stones, embedded in gypsum,” seemed to defy an enemy who could only approach her by sea. “In order to make the wall twice as strong they built a second wall ten cubits broad, leaving a space between of five cubits, which they filled with stones and earth.” Yet high walls…”

“9:3-4 Strong fortress (Hebrew matsor) is a pun on the name of the city of Tyre (Hebrew tsor). This famed island fortress (Isa 23:4; Ezek 26:5) was captured and destroyed by Alexander the Great in 332 BC.”

“build: Jos 19:29; Sa2 24:7 heaped: Kg1 10:27; Job 22:24, Job 27:16; Isa 23:8; Eze 27:33, Eze 28:4, Eze 28:5 Zechariah 9:4”