Good Question.. well it's called Witchmark Observatory for two reasons really. The first.. well, we're lucky enough to live rurally in a place called Pendle, in the Forest of Bowland.
We live on the slopes of Pendle Hill in a village called Barley which is famous for the Pendle Hill Witch Trials.
The Pendle Hill witch trials were a series of infamous witch trials that took place in 1612 in Lancashire, England, leading to the execution of ten people. Considered one of the most famous and well-documented witch hunts in English history.
The second is because of some of the markings we've found around our property. Although there's a date stone on 1878 above our front door, research has shown that the house was originally 17th century dwelling that was refaced and "Gentrified" in the early Victorian era by a local Doctor Edward Buck. There are still some parts internally and externally that you can see of the original house including a cobbled stable and the original Oak door with a few of these "Witch Marks" carved into it, the picture at the top of this post is the one on our old door and is why the logo is a daisy wheel.
These Witchmarks or apotropaic symbols are marks that are meant to ward off evil—often found carved into buildings, furniture, or other objects, particularly near doorways, windows, and fireplaces. Have a google, you'll see them a lot in old buildings and we've found it quite fun to go Witchmark Hunting when we go out as a family.
So with an old house that has the foundations of a dwelling that was around at the time of the Witch trials... an old stable door with markings to ward off evil spirits.. on the side of Pendle Hill... it had to be called Witchmark Observatory.
And yes, we've seen some strange goings on in the house. You'll have to ask me about that when you visit... and if you're staying over to make use of the Observatory, you may see some too :)