I wanted to let you know how to protect your city from thieves in your early stages.  I know you all are advised to worry about Storehouse and Library in the beginning.  You also need to focus on protecting your city.  Here is a list of Runes that your should put in effect as your Mage Tower grows:

Mark of Seeking - kills 12 foes lvl 2 Mage (set for Thieves)
Seeking Rune - Kills 40 foes lvl 6 Mage (set for Thieves)
Seeking Glyph - kills 130 foes lvl 10 Mage(set for Thieves)
Ward of Intentions - kills 400 foes lvl 14 Mage (set for Thieves)
Ward of Destruction - Kills 250 of anything - lvl 15 Mage

The next thing I would focus on is Consulate. Level it up to at least 9 to build thieves.  You can choose to build them by clicking on the Consulate or by hovering your mouse over the Rose Icon and then click on the bird icon on the right. Remember basic diplomats defend against Advanced and Basic if you have enough.

Let a vet know you need the advanced resources to build Diplomats and they will be more than willing to help you out.  You may not be able to stop every Thieve attack, but you can at least make it hurt  when they do. I hope this helps you build a more secure city.

Sincerely,

LadyLuvs, Chancellor of T?