advocate

n. a person (as a lawyer) who works and argues in support of another's cause esp. in court
a person or group that defends or maintains a cause or proposal <a consumer advocate>

carillon

n. a stationary set of chromatically tuned bells in a tower, usually played from a keyboard

commemorate

v. to honor the memory of with a ceremony

dignitary

n. a person of high rank or position

icon

n. an image; a representation

one who is the object of great attention and devotion; an idol: “He is... a pop icon designed and manufactured for the video generation” (Harry F. Waters).

movers and shakers

n. a person who wields power and influence

in a particular activity or field, as in, “He's one of the movers and shakers in the art world.”

nexus

n. the core or center: “The real nexus of the money culture [was] Wall Street” (Bill Barol).

popular culture

n. contemporary lifestyle and items that are well known and generally accepted, cultural patterns that are widespread within a population; also called pop culture

predecessor

n. one who precedes another in time, especially in holding an office or position;
smething that has been succeeded by another: The new building is more spacious than its predecessor

Sierra Club

n. a U.S. environmental organization founded in 1892 dedicated to the preservation and expansion of the worlds parks, wildlife, and wilderness areas