Solar observatory in Peru

Well it is true that lately I'm writing more about Peru. There is a reason, this is a country where the bad news were each day filling the newspapers and lately there are some good news coming from there and that are related to "culture" and Human heritage.
This time the University of Yale announced on their web site:
"... Archeologists from Yale and the University of Leicester have identified an ancient solar observatory at Chankillo, Peru as the oldest in the Americas with alignments covering the entire solar year, according to an article in the March 2 issue of Science." You can read the article here.
In the first image you can see the fortified stone temple called Chankillo.
Bellow you see an image explaining how the solar observatory was used.

Joint Statement by the Government of Peru and Yale University

As mentioned in a previous post Peru and Yale University signed an agreement. You can read the "news release" from Yale's site.
Here a paragraph I think is important:
"This understanding represents a new model of international cooperation providing for the collaborative stewardship of cultural and natural treasures."

Yale will return thousands of Inca relics to Peru

That's a great thing!
Universities are of course the center piece for research. In poor countries like Peru the foreign institutions are even more important to preserve the heritage of our ancestors. But I also think that the cultural property must be where it belongs, in the right time.
The problem is that sometimes the place where the relics are discovered can't offer the warranties needed for their preservation. Is then when civilization should take place and the interests of humanity should be the only valid argument.
The agreement between Peru and Yale is a good sample of it. After long time of negotiations they have arrived to a situation where students, scholars and humanity will get the clear benefit.
More than 4000 pieces will return to their native land. You can read more in BBC News.