Audit Trail: How to check who made changes to a Site?

Yes, eCompliance users with Admin-level access can view an audit trail, or log of activities. 

You must have top-site level Admin access and be logged in at your organization's top site to view the audit logs. 

To use the Audit Trail, go to your Home tab and click on "Audit Trail" under the Organizational Operations header (on the right-hand side of your screen). 

The type of activity will be shown in the first column, with a timestamp and the module within which the change was done, with the last column showing the name of the employee who made the change.