Where's Jack? Week three on the leek hunt

I don't know about you, but it's beginning to feel a lot like Christmas isn't it? Unfortunately for me, Jack still has my magic leek so instead of conjuring my Christmas shopping this year, I'll have to do it online. Only slightly less magical, I suppose. 

The scamp is still hiding from me, but well done for guessing where he was last week - the beautiful Ancient High House. Did you know King Charles I once stayed there? 

But enough wittering, the Stafford Gatehouse team and I still need your help retrieving my magic leek. 

Jack is hiding in a new Stafford location this week and if you can help us guess where, you'll have a chance to win two tickets to this year's rock 'n' roll panto. 

Here's the riddle:

The bricks are old, the windows are stained, 
This building was restored when King John reigned.
You can hear its voice from the tallest tower,
The quarters, the halves and dead on the hour. 
This place is a sanctum, not just for pigeons to perch
In honour of St Mary stands this impressive... 

Do you have an idea where Jack is? Comment below with your name and e-mail address to submit your answer - it's that easy.  The winner of the third pair of tickets will be announced this Friday afternoon.  Good luck everyone!

After the winner is announced, they will be contacted by our press and marketing officer, Emma Hogan, via email, for further details on claiming their prize. 
To find out more about this year’s rock ’n’ roll panto, visit 
www.staffordgatehousetheatre.co.uk.