So many people were coming to Chicago from all over the world that many smaller conferences, called Congresses and Parliaments, were scheduled to take advantage of this unprecedented gathering.

There will be an unprecedented gathering - nearly 100 - of the artist's dark, mysterious charcoal drawings.

The MoMA called the exhibition "an unprecedented gathering of [Marden's] work, with more than fifty paintings and an equal number of drawings, organized chronologically, drawn from all phases of the artist's career."

The United States called it "an unprecedented gathering."

Edward, the object of this unprecedented gathering of nations, was often called the "Uncle of Europe," a title which, insofar as Europe's ruling houses were meant, could be taken literally.

In September 1991, an unprecedented gathering of 220 Soviet officials and citizens arrived for the U.S.-Soviet Union Sister Cities conference.

Security was tight, almost oppressively so, but it did not deter from the festival atmosphere of this unprecedented gathering.

The Conference hosted an unprecedented gathering of leading international experts on nuclear non-proliferation.

This unprecedented gathering of young people is often considered to have been a social experiment, because of all the alternative lifestyles which became more common and accepted such as gender equality, communal living and free love.

This will be an unprecedented gathering of golf's biggest names so early in the year, with the top four players in the world in attendance.