There is an old monument standing in this park.

The Paleoarchean eon is a very old era in the history of the Earth.

The Paleoproterozoic era was a very important period in the history of the Earth.

He is good at playing the guqin.

I am learning Old English.

This antique clock is a keepsake from my grandfather.

He has come to look old recently.

I am interested in learning Old French.

He held the vajra in his hand and offered a prayer.

The teachings of the ancient sage are still important to us today.