The documentation is still here as source, and can built using Sphinx
with "make html":
https://sourceforge.net/p/turbogears1/code/HEAD/tree/docs/1.5/
I had been the last maintainer of TG 1.5, but haven't touched it since
years. Not sure what we shall do with TG 1.5. Everything is now so
horribly outdated and depending on other outdated and unmaintained
projects. You are forced to use very old versions of these projects to
make things work. Also the 1.5 docs were never completed, and referred
to 1.0 docs for missing parts.
Maybe it's better to not even provide live docs any more because they
are so outdated, incomplete and misleading?
Or, if there is larger interest, maybe I could provide one last bugfix
release with frozen upper limits for the dependencies in the setup.py
(currently there are only lower limits and therefore it will probably
only work with the package index for TG 1.5 on the TurboGears server,
which might also go offline some day). Then I could also provide a last
frozen version of the 1.x docs with notes about the discontinued state
of the project and recommendation to upgrade to TG 2.
-- Chris