We have all been there we take over a solution we didn’t develop and the complexity, hierarchy and structure of the templates is completely crazy!!!
You have a field, but trying to find the definition and or what template it belongs to is a nightmare.
The Solution How to find any field with 1 click!
Open up DbBrowser (sitecore/admin/dbbrowser.aspx) navigate to the item and click on the field and it takes you directly to the fields definition.
I can’t believe I have used so much time trying to unravel the base Template field to find where a field is defined in sitecore, when there is such a simple solution.
I hope this helps others 🙂
Alan Coates - Sitecore/.NET blog 
This is cool. Even the dbbrowser page! One can learn something new anytime 🙂 Thanks for sharing!
You could also click the template link in the content item, switch to the inheritance tab, find the field and click it from there. 🙂
The solution had crazy multi inheritance and fields with the same name. I believe db browser is quicker than tracing all the base templates
What u suggested is what I’ve done the past 13 years, db browser is faster