- 
  
  
- 
  
  The Pennsylvania Railroad Company is founded in 1846.
- 
  
  
- 
  
  
- 
  
  
- 
  
  
- 
  
  The Penn Station is constructed.
- 
  
  Excavation at Night is finished in 1908.
- 
  
  Construction of the Penn Station Ends
- 
  
  
- 
  
  
- 
  
  
- 
  
  
- 
  
  The aboveground portions of Penn Station are demolished.
