*** UPDATE FEBRUARY 2016 ***
Google is retiring Picasa (sigh). See http://googlephotos.blogspot.co.uk/2016/02/moving-on-from-picasa.html
For now the information given on this page still works. But be aware that this is subject to change. I will endeavour to keep this page updated, but I can't promise it :-)
Picasa albums are no longer supported.- Existing albums now only display a thumbnail.
- The thumbnail links to the album archive except in some cases
- There is a class of old albums for which the links are not going to work as they do not contain the right information.
for this class of albums, replacing the email id in the embed spec with the userid string (or reinserting the album) should result in the gadget now linking to the album.
e.g. If when you examine the URL in the embed specification of the Picasa Slideshow you see something like:
if you replace the part in bold (the email ID) with the numeric userID that you see when you look at your photo archives, the gadget will now act as a link to the relevant album.
The URL will now look something like
However, Picasa embeds are deprecated and it is recommended you move to an alternative. Some examples are given here.
See also the marvellous Tutorial: Create a slideshow in Google Sites with Photo Gallery
Here is a slideshow created using Photo Gallery
Storing photographs and other pictures in a Picasa Web Album makes them easy to embed in Google sites pages and, importantly, does not eat in to the Site space limit. You can also purchase more storage if needed.
If when editing your site you are logged in to the same account as you use for Picasaweb, then
On the right is a Picasaweb image that has been embedded, right justified, wrap on.
Picasa Web Slideshow
THIS SECTION IS UNDER REVISION
There are two ways of doing this.
You can also add a Picasaweb Slide using the url of the album:
On the right is a Picasaweb slideshow that has been embedded, right justified, wrap on.
If you want to make an album visible publicly but don't want to announce this on Google+ or you want to make an album visible to 'anyone with the link' then as far as I know (at the time of writing, Nov '13) the ONLY way of doing this is via the Picasaweb interface. It cannot be done using Google Plus. If it helps, the way to think of it is that Google provide two tools to provide access to a common repository of photos: Google+ and Picasaweb. Each tool provides different functions. Some are common, some are unique to the specific tool. You have to choose the tool appropriate to your needs.
To insert a single photo from Google Photos without using the Picasaweb interface: