And current languages too. A while back I found this diagram http://imgur.com/ZNlwDUZ, to me it shows how logical greeks were. Terms are symmetrical, well organized, forming a tiny core of combinators.

That diagram is great, but I'm not sure this sort of preposition inventory is that specific to ancient Greek. When I studied German, I feel like we had rather similar charts.

German has specific prepositions I recognize as equivalent to each main Greek preposition as defined in that chart, except maybe the distinction between εις and εν, which German would handle by a noun case distinction (ancient Greek εις την θαλασσαν → German ins Meer (accusative, < "in das"), ancient Greek εν τῃ θαλασσῃ → German im Meer (ablative, < "in dem"). German breaks up some meanings differently -- "among" is unter (shared with "beneath" rather than "between") -- but anyway there are other languages with a pretty nice set of prepositions!

Thanks, I'm all for finding similar structures in other languages.

I upvoted you for your last sentence alone. What high school did you go to, and is it still heavily focused on Latin and Greek?

Probably is a common Liceo Classico in Italy, where Latin and Greek are teached each for 5 and 4 hours a week during the first two years and 4 and 3 hours during the following three years.

which highlights the point that choice of subjects should very much be culture-specific.

Picking up latin as an italian seems far simpler (and probably more useful) than as an english, as you can guess large part of the lexicon and you will be exposed to "volgare" (transitional latin-italian) when studying early italian literature.

But would studying Old English be of any use for italians? I am not sure.

Yes, I attended an experimental classico.