Greece was created as an independent state in the 1820s. Maybe it's not really resurrecting an ancient nation since it's not as if Byzantines were in power, but they restored an ancient identity that had previously been subsumed by a larger state. This is similar to the creation of modern Israel in the 20th century, at least by my reckoning.
What were some other possible ancient nations that could have been restored in the 19th century? Like perhaps the crusader states?!?