Definition of "400th" [400th]

• The ordinal number of four hundred in counting order (adjective)

WordNet. Princeton University. 2010.

• "Celebrating the 400th anniversary of Tomás Luis de Victoria, the a cappella group Stile Antico created awesome blocks of light and shade from the music of Victoria and his contemporaries."
• "Celebrating the 400th anniversary of Tomás Luis de Victoria, the a cappella group Stile Antico created awesome blocks of light and shade from the music of Victoria and his contemporaries."
• "For Claudio Strinati, curator of last year's exhibition in Rome one of more than a dozen marking the 400th anniversary of the painter's death, Caravaggio's art was revolutionary not simply for the bold stylistic and thematic innovations but because for the first time in Western culture the autobiographical impulse is explicit and ever present: "The master speaks of himself from beginning to end and interrogates the spectator.""