Board Thread:Dragon City Gameplay Questions & Answers/@comment-14032866-20130731111524/@comment-10090661-20130826093420

You could try. =D But I don't think it will let you. The Master Temple will only allow leveling up to lv 30. I tried it with the Knight Temple, the button also shows possibility, but when I clicked, I got a message telling me I need to build the next temple.

Ummm If I remember correctly, someone already answered this question elsewhere. Or something similar to it.