What is the word for something that is very old and long lasting

One thing is very old words:

Old-fashioned - something old or outdated, also refers to a person with old-fashioned ideas or old-fashioned habits.

Old-fashioned - describes things, speech, etc. as old and outdated.

Old eight lifetimes - extremely old and obsolete.

Yuan Yuan Liu Chang - The source is very far away and the water flows very long. A metaphor for a long history.

Yuan Guang Liu Chang - The source is very far away and the water flows for a long time. It is a metaphor for a long history.

Ancient - describes objects, paintings and calligraphy that are rich in classical and elegant colors and moods.

Source deep and flow long - the source is very deep and the water flows long. Metaphorically speaking, it has a long history.