Alexander filmed at Grand Harbour, Valletta. This harbour stood in for the port of Alexandria, with a little digital work added. On screen it's Port of Alexandria.
Probable Named in published production coverage; the coordinate is the place itself, checked against a gazetteer. This is an area, not a spot. The coordinate is its middle, so use it to navigate to the place and not to line up a shot.
Planning the trip? The Malta travel atlas covers money, language and getting aroundand everything filmed in Valletta is on one page
Venture keeps every scene location on one map, sorted by how far you'd have to walk. Open it in Valletta and it tells you what was shot around you, how to get there, and whether you can actually go in.
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