I have another simple page with a TimelineJS embed from knightlab.com that works fine, so it seems like this is a case of ArcGIS online urls not being in the whitelist? I couldn’t find documentation anywhere for what sites are allowed in iframes on Omeka.net, but is there a place to petition for inclusion, or a setting I’m overlooking?
Thanks for the clarification. Adding arcgis online embed support would be great.
At risk of continuing a discussion about Omeka.net in the wrong place, is there a way to search those documents? I did look but couldn’t find the list of allowed iframes very easily. Thanks again!