since the early twentieth century

The Greeks discovered the Italian peninsula in the 7th century BCE.

While it is the academic consensus that it is a fourteenth-century work, some support a fifteenth-century hypothesis.

In the end of the 19th century, the Western barbarians invaded [the country] like a flood.

The pre-contemporary Korean-language letters are not a corpus from a single period, but one that stretches from the sixteenth to the nineteenth centuries.

Hangul is a script created in the fifteenth century.