Trianon - Frankfurt am Main - was created in 1993.
Frankfurt Rhine-Main was created on 2001-04-01.
Internationale Schule Frankfurt Rhein-Main was created in 1994.
Le Petit Trianon was created in 1892.
Live au Trianon was created in 2006.
Frankfurt am Main = Frankfurt on the Main. The 'am' is short for 'an dem' = 'on the'. Main = the name of a river. I have not heard it abbreviated Frankfurt AM, normally Frankfurt/Main, or Frankfurt(Main), or FFM, or FRA, but I guess it could be abbreviated like that. See http://en.wikipedia.org/wiki/Frankfurt for more details -- including an explanation of the two Frankfurts in Germany.
in frankfurt am main ..
Frankfurt am Main
Frankfurt - Bezirk - was created in 1952.
Frankfurt Lions was created in 1959.
Frankfurt Marathon was created in 1981.
Festhalle Frankfurt was created in 1909.
Eurotower - Frankfurt - was created in 1977.