I'm not sure what it is about years ending in 4 and 9, but like most years, this is proof that they are the years to start something.
Shrine of St. Ferdinand
Historic Trinity Lutheran Church (in Soulard)
Lyon Park (established)
General Lyon Monument (at Lyon Park)
St. Louis Children's Hospital
Kirkwood Train Station
Cathedral Basilica of Saint Louis (New Cathedral)
Central Institute for the Deaf (CID)
The Naked Truth statue (located at the Compton Hill Reservoir Park)
The College School
Castlewood State Park
Broadway Oyster Bar
The Magic House
St. Louis Walk of Fame
Then of course, you got those who just missed the mark, or those who have a milestone next year. Most notably, the Gateway Arch will celebrate 50 years next year!