Some fun with CMS website design…
Changing the logo on a Joomla! website can be a little more complicated than you would normally think. And, that’s because the logo’s location varies from template to template. You can search the web, but I think it would just be easier to browse the website’s template directory.
For example, the JA Nickel template (when using the blue layout) has the logo here:
\templates\ja_nickel\images\blue\logo.png
And the Moxy template has the logo here:
\templates\rt_moxy_j15\images\header\style1\logo.png