Q proof 3247 "watch is in the castle"..picture of whitehouse oval office.
Q post 3234-"Find the reflection in the castle"
Q Post 2214- "Castle lock" I believe refers to whitehouse on lockdown which occurred around sametime.
Q Post 1490- "Potus back in the castle" where Q states castle = whitehouse
Q post 1473 Castle arrival good - back at whitehouse
While red and green castle refers to army core of engineers as stated by Q..just castle has specifically referred to the Whitehouse on several occasions. To me this means that Castle = Whitehouse