https://www.labrujulaverde.com/en/2024/12/a-sunken-ship-from-the-6th-century-bc-stone-and-iron-anchors-found-off-the-southern-coast-of-sicily/
But why did it sink....
I wondered what "su guscio" in the article meant, but https://archaeologymag.com/2024/12/6th-century-bce-shipwreck-discovered-off-sicily/ informs me it's "shell first" (as opposed to "frame first").
That sounds entirely reasonable. Galley hulls during this period and for several centuries afterwards were constructed shell first. That is, first a monococque of planks held together by mortice and tenon joints was built up before being strengthened with interior beams and stringers.
Morrison and Coates describe the process in detail.