When was the last time that a pope abroad wasn't received as a head of state?

I knew that I had read somewhere days and days ago that the Holy Father is not being received in Turkey as a head of state and finally see this at CNA this morning::

It was also announced recently that the Pope’s welcome has been downgraded to a second-class protocol instead of a first-class protocol, reported Turkish agency Hurriyet. The ceremonial differences between the two protocols mean that there will not be 21 cannon shots fired and that fewer soldiers will be present for his arrival.

 
The Pope will also stay at the Vatican Embassy rather than in the Glass House in the President’s Çankaya Köşk, which is usually set aside for foreign heads of state.

Who knows what the Holy See has 'needed' diplomatically to make the upcoming pastoral visit 'work' or what Ankara has (and the Turkish government's 'needs' have been far greater, I imagine): I'm sure that Benedict XVI personally doesn't care whether the secular government fires off 21 or 11 or no guns.  The snub, while understandable enough in terms of political expediency, doesn't seem calculated to much impress the Euros with Turkey's openness to the West: maybe Ankara has finally understood that Euroheaven is no longer on its--even distant--horizon.