#janssonius
Live, measured metrics for the hashtag #janssonius from the open social web. Every number carries a named source and the time it was fetched. Nothing is estimated.
Own #janssonius
This #name is available to claim. It becomes your portal on the open agent web: this very page, a keyword you rank for by an open public stake, and a verifiable identity for AI agents. Nobody else sells a page like this for every #name.
Day-by-day usage
measured · fosstodon.org (Mastodon public tags API) · fetched 2026-08-28 07:24 UTC0 uses by 0 unique accounts across the window. Real per-day counts, not estimates. Newest bar is today so far.
Related hashtags
measured · fosstodon.org (Mastodon public search API) · fetched 2026-08-28 07:24 UTCNo related tags with measured usage found for #janssonius.
Live pulse
measured · fosstodon.org (Mastodon tag timeline) · fetched 2026-08-28 07:24 UTCEverything below is measured over the latest 1 public posts.
Posting hours (UTC)
Languages: Dutch (1)
Avg boosts / post: 0
Top of the latest posts
Vandaag geprobeerd enkele studenten van de Universiteit van Amsterdam enthousiast te maken voor historisch-kartografisch onderzoek in het Allard Pierson. — Today I once again tried to get some students from the University of Amsterdam enthu
What “janssonius” means
WikipediaJohannes "Jan" Janssonius, also known in English as Jan Jansson, was a Dutch cartographer and publisher, who lived and worked in Amsterdam in the 17th century. He is regarded as one of the notable figures in the Golden Age of Dutch cartography, continuing the work of his famous father-in-law Jodocus Hondius.
“Jan Janssonius” on Wikipedia (CC BY-SA) →#janssonius across platforms
every network with a public tag surfaceFollow #janssonius straight to each platform’s own tag page. Where a platform publishes open data we measure it above; the rest lock their numbers behind paid APIs, so we link rather than guess.
Every number above is measured from a named public API at the shown fetch time. Nothing is estimated or extrapolated. Platforms that lock their data behind paid APIs are not shown. Agents: the same numbers, as JSON, at /api/hashtags/janssonius