To identify the template Id of the list, navigate to the list and go to the ‘All Items’ view. In the browser, go to ‘View – Source’ and search for “ctx.listTemplate”. The ‘Pages’ Library will show – “ctx.listTemplate = 850” and the ‘Images’ library will show “ctx.listTemplate = 101”.
For other template types, you will need to look up the list ID. You can use the following PowerShell method to retrieve the information about the lists within the site
Additionally, you can use the following SQL query to enumerate all the template IDs that are used in your site collection
The information is available in the spreadsheet at the end of this post.