His death in 211 triggered what historians call the crisis of the third century.

But much has also changed since the crisis that historians have called the most dangerous moment in recorded time.

Many historians called the killings the first genocide of the 20th century.

Although modern historians have called him a gunfighter, others say he was not.

He is currently marked as a "historian" on a show called Prime 9.

One historian called him "a plunderer in the world class."

At least that's what the military historians call it.

In doing so, Richard compiled what modern historians have called a "universal history".

One local historian called the result a "growth" that no longer had any architectural merit.

Despite this, the water quality has still improved, with several historians having called it at various times in the past as an "open sewer".