For a Django project with requirements and deployment tools under source control. This example builds upon concepts from the Two Scoops of Django. They have published a template:

repository/
    docs/
    .gitignore
    project/
        apps/
            blog/
                migrations/
                static/ #( optional )
                    blog/
                        some.css
                templates/ #( optional )
                    blog/
                        some.html
                models.py
                tests.py
                admin.py
                apps.py #( django 1.9 and later )
                views.py
            accounts/
                #... ( same as blog )
            search/
                #... ( same as blog )
        conf/
            settings/
                local.py
                development.py
                production.py
            wsgi
            urls.py
        static/
        templates/
    deploy/
        fabfile.py
    requirements/
        base.txt
        local.txt
    README
    AUTHORS
    LICENSE

Here apps and conf folders contain user created applications and core configuration folder for the project respectively.

static and templates folders in project directory contains static files and html markup files respectively that are being used globally throughout the project.

And all app folders blog, accounts and search may also ( mostly ) contain static and templates folders.

static and templates folder in the apps may should also contain a folder with the name of app ex. blog this is a convention used to prevent namespace pollution, so we reference the files like /blog/base.html rather than /base.html which provides more clarity about the file we are referencing and preserves namespace.

Example: templates folder inside blog and search applications contains a file with name base.html, and when referencing the file in views your application gets confused in which file to render.

(Project Structure)
.../project/
    apps/
        blog/
            templates/
                base.html
        search/
            templates/
                base.html

(blog/views.py)
def some_func(request):
    return render(request, "/base.html")

(search/views.py)
def some_func(request):
    return render(request, "/base.html")

## After creating a folder inside /blog/templates/(blog) ##

(Project Structure)
.../project/
    apps/
        blog/
            templates/
                blog/
                    base.html
        search/
            templates/
                search/
                    base.html

(blog/views.py)
def some_func(request):
    return render(request, "/blog/base.html")

(search/views.py)
def some_func(request):
    return render(request, "/search/base.html")