He began to exhibit his works in the early 1990s.

Since the 1960s his works have been exhibited all over the world.

The works are exhibited at the Met for six months every year.

His works were exhibited for the first time in 1847.

Since 1975 his works have been exhibited in 15 countries.

About 300 of his works are now exhibited in nine countries.

Since then, he has exhibited several works of original art.

At the age of just 13, in 1815, he exhibited works there.

But about half the works here have never or only rarely been exhibited.

Because of the limited space, many works in the collection were never exhibited.