Hey all, and thank you for all your comments.
I also argue against the Luther sites and those are more localised and tangible than some spots around the globe. For the things you describe, intangible heritage exists.
From the UNESCO site The inscription would be part od the UNESCO Roads of Dialogue concept " already inscribed in the UNESCO World Heritage List such as the Chinese Section of the Silk Road, the Qhapaq Ñan Andean Road System, the Struve Geodetic Arc, the Astronomical Observatories of Ukraine and the Liberation Heritage Route." you can also add the Caminos de Santiago in Spain...
Looking at Wikipedia (EN), I have to state that a) the section on architecture is rather short and b) the architects don't even have their own wiki pages. This may be an overlooked treasure, but it seems the internet architecture community does not value the building too highly. If it were more off the beaten path or centuries older, I would understand. But it's a prominent structure in Lisboa built less than 100 years ago.
Also, you can find this information on the UNESCO site "A paradigm of the architecture of the modern movement, this property is included in the DOCOMOMO list of the 100 architectural monuments of the 20th century", as to not appear on the internet, Portugal is a small country with only 10 million people, not finding any information online or in the Wikipedia should not count as a parameter. I do try my best to make entries on Wikipedia relevant to Portuguese history and culture, but I think this is a problem most small countries have in common.
Again, big does not equate OUV. I can see a case for late antiquity or Moorish middle ages missing on the list. It's just not much OUV from my point of view.
You can find some studies being made by the Vatican because it is considered very important even in the context of the history of religion and in particular the different branches of Christianity in early Europe.
If anyone has 30 minutes to spare this podcast about Magellan and his voyage might be of interest. Titled "The Magellan Myth Uncovered" it involves the Anglo/British historian Felipe Fernandez Armesto who is a specialist in the period and the area. He may be regarded as too pro-Spanish and I would be interested in any rebuttal from the Portuguese "side"!
I would suggest a very interesting documentary from the french channel Arte, that listens to Portuguese, Spanish, British, French and South American specialists.
Its called MAGELLAN'S EXTRAORDINARY ODYSSEY - you can find it here https://en.unifrance.org/movie/55780/magellan-s-extraordinary-odyssey
Portuguese version: https://www.rtp.pt/play/p11117/e662003/a-odisseia-de-fernao-de-magalhaes
If I am reading it correctly the Portuguese nomination in 2017 seemed to have caused a bit of controversy in some of the Spanish press for proposing it alone, and that it is now (from 2019 onwards) the two Iberian countries to lead on it together?
Though this isn't reflected anywhere on the UNESCO site, so thanks for flagging up this change.
I also did not find the information updated on the UNESCO site, however as you can see from the joint document emitted in 2019, the two countries were planning on doing this.
Here the joint declaration from Portugal and Spain: https://www.portugal.gov.pt/download-ficheiros/ficheiro.aspx?v=%3d%3dBAAAAB%2bLCAAAAAAABAAzNzU2AQD6qce7BAAAAA%3d%3d
Thank you all