They could hardly be more different from the challenging works he denounced as "morally defective."

Freud's most challenging works are saved for the last room of the show.

Harrell himself considers the arrangements and compositions some of the most challenging works he has written to date.

One might assume that museums and other cultural organizations could provide a safe haven for challenging works.

It also criticizes what it calls "a climate of intolerance for challenging works and ideas."

A satisfactory substitute in the Brahms - one of the more challenging works in the repertory - could not be found.

In his remaining years, some of his most challenging and innovative works in this field would develop.

There is no shortage of audience for new and challenging works.

Thom Merrick is known for creating formally challenging works in different media with a keen awareness of art history.

It has been a home for pieces by Israeli composers and lesser-known or more challenging modern works.