The ultimate Ferrari barn find has been sitting in Speedway, Indiana after remaining “untouched for decades.”

While details are a little hazy, RM Sotheby’s said the collection of 20 cars was originally housed in Florida and sat still since 1990. The cars were awaken from their slumber in 2004, when Hurricane Charley battered the Sunshine State and caused the barn where the cars were parked to partially collapse.

This damaged a number of them, but it exposed the cars for the first time in over a decade. After the storm had passed, the Ferraris were relocated to a secure warehouse in Indiana where they remained untouched.

More: Amazing Collection Of 230 Classic Cars Discovered In Hidden Barn Find

This is pretty remarkable and the auction house noted an “unsuspecting observer would never fathom that some of these lost Ferraris have graced the world’s most famous races, such as Le Mans, the Targa Florio, and the Mille Miglia. Nor would they suspect that a Ferrari once owned by royalty rests silently in the heart of Indiana.”

RM Sotheby’s will be auctioning the collection, without reserve, during Monterey Car Week and it’s expected to fetch millions of dollars. While you can check out all of the cars here, we’ll mention a handful that will be available in August.

1956 Ferrari 250 GT Coupe Speciale by Pinin Farina

The first belonged to royalty as King Mohamed V of Morocco purchased this 1956 Ferrari 250 GT Coupe Speciale by Pinin Farina. It’s one of only four models that was equipped with “Superamerica-style coachwork” in 1956.

The car is in rough shape, but it features a numbers-matching V12 and would make for a “tantalizing restoration candidate.” It’s expected to fetch between $1.7 and $2.3 (£1.3 – £1.8 / €1.5 – €2.1) million.

1965 Ferrari 275 GTB/6C Alloy by Scaglietti

1965 Ferrari 275 GTB/6C Alloy by Scaglietti

If royalty isn’t your thing, perhaps this 1965 Ferrari 275 GTB/6C Alloy by Scaglietti is more up your alley. It was reportedly shown at the Torino Motor Show, before competing in the 1966 Targa Florio.

The model is said to be the “first ‘long-nose’ 275 GTB to be fitted with a low-weight alloy body and six carburetors,” and that only helps its valuation. Speaking of which, the model has an auction estimate of between $2 and $2.5 (£1.6 – £2 / €1.9 – €2.3) million.

1954 Ferrari 500 Mondial Spider Series I by Pinin Farina

Perhaps the most interesting, and most destroyed, is the 1954 Ferrari 500 Mondial Spider Series I by Pinin Farina. While it’s not much to look at, the twisted hunk of metal has the most extensive racing history of any car in the collection.

RM Sotheby’s said it was “originally clothed in Pinin Farina Spider coachwork” and bought by “Scuderia Guastalla principal Franco Cornacchia for the use of ex-Scuderia Ferrari driver Franco Cortese.” Cortese used the car to win fourth in class (14th overall) at the 1954 Mille Miglia.

The car was then rebodied by Scaglietti and it continued racing including at the 1956 Targa Florio. Despite being little more than a “weathered” shell these days, the model is expected to fetch up to $1.6 (£1.2 / $1.5) million.

1978 Ferrari 512 BB Competizione

While that’s just a glimpse at the models up for grabs, here’s the full list:

  • 1978 Ferrari 512 BB Competizione                                                        
  • 1965 Ferrari 275 GTB/6C Alloy by Scaglietti                                                      
  • 1956 Ferrari 250 GT Coupe Speciale by Pinin Farina                              
  • 1956 Ferrari 410 Superamerica Coupe Series I by Pinin Farina               
  • 1967 Ferrari 330 GTS by Pininfarina                                                                  
  • 1954 Ferrari 500 Mondial Spider Series I by Pinin Farina                                   
  • 1965 Ferrari 275 GTS by Pininfarina                                                      
  • 1964 Ferrari 250 GT/L Berlinetta Lusso by Scaglietti                              
  • 1971 Ferrari 365 GTB/4 Daytona Berlinetta by Scaglietti                       
  • 1972 Ferrari 365 GTB/4 Daytona Berlinetta by Scaglietti                       
  • 1968 Ferrari Dino 206 GT by Scaglietti                                                  
  • 1960 Ferrari 250 GT Coupe Series II by Pinin Farina                               
  • 1972 Ferrari 365 GTC/4 by Pininfarina                                                              
  • 1966 Ferrari 330 GT 2+2 Series II by Pininfarina            
  • 1976 Ferrari 308 GTB ‘Vetroresina’ by Scaglietti                                    
  • 1969 Ferrari 365 GT 2+2 by Pininfarina                                                 
  • 1965 Ferrari 330 GT 2+2 Series I ‘Interim’ by Pininfarina                                   
  • 1980 Ferrari 512 BB                                                                             
  • 1991 Ferrari Testarossa                                                                        
  • 1977 Ferrari 400 Automatic

1956 Ferrari 410 Superamerica

1971 Ferrari 365 GTB

1968 Ferrari Dino 206 GT

1960 Ferrari 250 GT Coupe

Pictures: RM Sotheby’s