Scavino tweets a similar structure to the Old North Church in Boston. This is the famous Paul Revere church of the Midnight Ride in the American Revolution. And this is the reason Anons are called Midnight Riders by Q.

His coded signal were lanterns in the church window. One lantern if the British were coming by land and two lanterns if they were coming by sea.

Are we awaiting the signal?
Watch the water...
https://twitter.com/danscavino/status/1408376002510721028?s=21