Age of Titles

Common title convention. Somewhere in the title will be the words "age of (insert age here)". "The" is optional.

A subtrope of The X of Y.

Comic Books

 * The Ages of Super Hero Comics
 * The Golden Age of Comic Books
 * The Silver Age of Comic Books
 * The Bronze Age of Comic Books
 * The Dark Age of Comic Books
 * The Modern Age of Comic Books

Literature

 * The Age of Innocence by Edith Warton.
 * The Age of Reason: Being an Investigation of True and Fabulous Theology by Thomas Paine.
 * The Age of American Unreason, by Susan Jacoby.
 * The books of James Lovegroves Pantheon series: The Age of Ra, The Age of Odin,' The Age of Zeus and The Age of Aztec.''

Live Action TV

 * The Golden Age of Ballooning

Music

 * Iron Maiden's "Age Of Innocence"
 * Turbonegro's The Age Of Pamparius
 * Blind Guardian - "Age of False Innocence"

Web Original

 * Age of Autism

Video Games

 * Dark Age of Camelot
 * Age of Empires
 * Age of Empires II: The Age Of Kings
 * Age of Mythology
 * Warhammer: Age of Reckoning
 * Age of Conan
 * Fall From Heaven Age of Ice
 * The Age of Decadence
 * Age of Wonders
 * Remember 11: The Age of Infinity

Musicals

 * Hair (theatre): "This is the dawning of the Age of Aquarius..."

Real Life

 * Commonly used to describe time periods to emphasize certain elements of the time period. (Age of Sail, Age of discovery, etc.)
 * To wit: Age of Austerity.

Other

 * The Age of Facebook