The ruins at Knossos were first discovered in 1878 by a local man, Minos Kalokairinos, and the earliest excavations were made. After that several Cretans attempted to continue the dig but it was not until 1900 that the English archeologist Arthur Evans purchased the entire site and carried out massive excavations and reconstructions.
These days archaeology is carefully regulated and supervised by academics who apply scientific rigour (except for Tony Robinson and the Time Team of course) to make sure that history isn’t compromised but it was very different a hundred years ago when wealthy amateurs could pretty much do as they pleased and went around digging up anything that they could find of interest and aggressively reinterpreting it.