The word "nineteenth" refers to being in or relating to the number 19, or pertaining to something that is associated with the nineteenth position in a sequence or series.
The main residence building was built by the Dutch in the late nineteenth century as a gift to the king to help strengthen ties. (dive-the-world.com)
This epic project is represented in the exhibition by a series of eight carbon prints that utilize the earliest of nineteenth - century color - photographic methods. (minusspace.com)
The hall was built in the late nineteenth century as a place of worship. (kerlingallery.com)