Like his predecessor Pius XII, Paul VI put much emphasis on the dialogue with all nations of the world through establishing diplomatic relations. The number of foreign embassies accredited to the Vatican doubled during his pontificate. This was a reflection of a new understanding between Church and State, which had been formulated first by Pius XI and Pius XII but decreed by Vatican II. The pastoral constitution Gaudium et spes stated that the Catholic Church is not bound to any form of government and willing to cooperate with all forms. The Church maintained its right to select bishops on its own without any interference by the State.
Who did Paul Vi want to maintain a continuing dialogue with?
nations

Selenizza is a naturally occurring solid hydrocarbon bitumen found in the native asphalt deposit of Selenice, in Albania, the only European asphalt mine still in use. The rock asphalt is found in the form of veins, filling cracks in a more or less horizontal direction. The bitumen content varies from 83% to 92% (soluble in carbon disulphide), with a penetration value near to zero and a softening point (ring & ball) around 120 °C. The insoluble matter, consisting mainly of silica ore, ranges from 8% to 17%.
What is it about the mine that is unusual?
still in use

Possibly the first house erected within the site was that of a Sir William Blake, around 1624. The next owner was Lord Goring, who from 1633 extended Blake's house and developed much of today's garden, then known as Goring Great Garden. He did not, however, obtain the freehold interest in the mulberry garden. Unbeknown to Goring, in 1640 the document "failed to pass the Great Seal before King Charles I fled London, which it needed to do for legal execution". It was this critical omission that helped the British royal family regain the freehold under King George III.
Under which king did the Royal Family regain the freehold title of the property?
King George III