How can I unlock the cathedral?

[bluesky300 1]

Hello everyone I am new to this game and I need your help!

I need to construct all city service buildings to unlock the cathedral. (needs 30)

I have constructed all the buildings I can (water, electricity, road maintenance, public transportation etc), but I still missed one.

I even construct a single road to construct the building one by one (see the bottom left in the screenshot) but it no help for me to find out the last service building I needed.

Does anyone know what 30 service buildings needed to unlock the cathedral? Or which service building is the most easy to miss?

 

[blackdragonbird 13]

Use google?

 

 

[bluesky300 1]

Thank you for this post. I can not use google because I am Chinese and google is walled by government I mean I can not visit the Google site in China without VPN.

Now I have completed the requirement for cathedral by visit the site you issued.

Thanks again!