Graecia capta ferum uictorem cepit et artis
        intulit agresti Latio.

Horace Epistulae 2. 1. 156-157.



Here are a few translations I found.
 
Captive Greece took her fierce victor hostage and
        brought the arts to rustic Latium.

Conquered Greece took her uncultivated conqueror captive and
        invaded rustic Latium with the arts.

Captive Greece took captive her savage conqueror,
        and brought civilisation to barbarous Latium.

Captive Greece has captured its wild captor.

Captive Greece took captive her rude conqueror.


Some quotes have Romam instead of ferum,
but ferum seems to be the original reading.

BRM