The collection includes
• old paintings and
• new paintings.
The old paintings are about 200 years old.
Many paintings are from the years 1880 to 1920.
The year 1880 was 140 years ago.
There were many changes in the world at that time.
They also say:
The modern era began then.
That is also what art from that time is called.
The art is called modern art.