Patriarch Teoctist, the head of the Orthodox Church in Romania, died of heart complications on Monday.
The surgical intervention was not an emergency one, but a programmed one. He was 92. He has served as head of the Romanian Orthodox Church since 1986.
Among Teoctist most famous accomplishments one can count the first visit of a Pope (John Paul II) to an Orthodox-majority country. Pope John Paul II visited Romania in 1999.

I don't know why this is an accomplishment. Did anything change in the papal mentality? Does not the pope continue in the way of the Primacy, that caused so many disasters to Christianity?

I think yes, in mentality of that Pope. But that Pope, also died. Unfortunately this Pope (Benedict) run back his Church with fifty years ago. Before the Vatican II Council.

The Church of Greece "mourns and prays for the soul of the departed Patriarch," Archbishop of Athens and All Greece Christodoulos said in a stetement on Tuesday upon hearing of the death of Romanian Patriarch Theoktistos.

"The Church of Greece also mourns the loss, honouring in the face of the departed Patriarch the prelate who in difficult times, with coolheadedness, wisdom and prudence secured for his Church unity, stability and delicate balances," Christodoulos said.

"The close ties linking the two Churches justify the interest of our Church that the Orthodox Church of Romania should have a worthy successor," Christodoulos added.

The Patriarch of Romania and Archbishop of Bucharest, Theoktistos, died on Monday evening at the age of 92 after suffering a heart attack following prostate surgery at Fundeni hospital in Bucharest.