This site represents work-in-progress (c. 95% done by 08.12.2019) to redesign an earlier version that hadn’t been updated since 2003. The number of views has been greatly expanded, and each view is classified using two main taxonomies: categories and tags. Categories make up the menu entries, and comprise top-level options for editors, places, dates, mounts, and sets, which subdivide further into their various subcategories (50+ is a single category). Tags classify each image according to its content, e.g. a view showing the Rossio Square in Lisbon is tagged “Rossio”. Categories allow you to navigate through the website, while tags help the recommendation system to propose “Related” views – so you may be able to see how Rossio evolved over time by following the related views proposed automatically by WordPress.

You should be able to reach any view starting from any of four main top level options: “Editors” (including Anonymous, Foreign and Portuguese), “Places” (18 districts, autonomous regions, former Portuguese possessions overseas, plus “Unidentified” when the place is unknown), “Dates”, and “Mounts” (every view is classified according to these four categories).

Free viewing is possible for those trained to do so, but you can also use a low-cost “Lorgnette viewer” to see the 3D effect in your computer, tablet or smartphone – see below how to use it and what errors to avoid. Also please bear in mind that size matters in this case: if you make the image too big or too small, viewing will be affected.

The author may be contacted at josemmfatgmaildotcom, but for practical reasons will decline requests to lend views, provide scans in any other form than shown here, etc. Apart from that he is always willing to share his knowledge and to learn further.