Given the type-centric nature of Sitecore, templates are all maintained
/sitecore/templates in the Sitecore content tree, but
implementation specific templates are maintained as part of a module.
Specifically, in the content tree they use the following structure:
where Module is the short name of the module, i.e. without prefixes.
Sitecore Helix Examples
The root layer folders (Project/Feature/Foundation) are now a native part of Sitecore.