Don Juan in Kent?

Today I walked down to Dane John gardens where there is a little kiosk selling refreshments and some great cooked food called Don Juan, presumably named after the gardens but perhaps after the proprietor? The cafe advertises 'Sabor Latino' (Latin taste) and its menu belies its humble size: you can get Sunday Roasts and a wonderful range of Mediterranean dishes and Mexican streetfood. 

The gardens are beautiful and if you walk to the top of the Dane John mound you get some stunning views:

This is the traditional site of the first Norman castle; it is a motte, whose Norman word is donjon. A plaque on the site records that it was built by Hamo, son of Vitales "who appears on the Bayeux tapestry" (it is not clear whether this refers to Hamo or Vitales). 

In 1790 Alderman James Simmons shaped Dane John unto a cone and laid out the gardens (PCG, 14).

By the Domesday book in 1086 the castle had moved to its present site. The donjon later became part of the fourteenth century walls that are still very much erect at this spot:

This path along the walls takes you to the Riding Gate whose name is probably a corruption of Red Gate after the traces of red Roman brick that can be seen in it. This was part of the Roman walls and the gate allows access fto the city along Watling Street. 

I discover from the Pitkin City Guide to Canterbury that "archaeologists have shown that the Normans raised their first defences on a Roman burial mound" which is the Dane John. You can climb to the top: