The phrase "nineteenth century" refers to the time period from 1801 until 1900. This was a significant era in world history, marked by major advancements and changes across various fields such as science, technology, industry, politics, and culture.
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)
For example, complex numbers were invented and the theory of them deeply investigated by the early nineteenth century, a mathematical development that seemed to have no relevance to physical reality. (firstthings.com)
The hall was built in the late nineteenth century as a place of worship. (kerlingallery.com)