By David Willey
BBC correspondent in Rome
Pope John Paul II has marked his 26th year as head of the Roman Catholic Church by attending a concert given by Russia's Red Army choir.
Red Army choristers used to sing about "razing the churches"...
Unthinkable before the fall of the Soviet Union, the event staged in the Vatican's general audience hall was televised live in Italy and Russia.
A Swiss Guard marched across the stage and a Russian military guard goose-stepped in the opposite direction.
Cossack dancers capered where religious ceremonies normally take place.
On the stage, bathed in red light, the choir founded more than 70 years ago by soldiers who took part in the Bolshevik revolution sang traditional Russian songs in full dress military uniform.
The Pope was wheeled on his portable throne into the central aisle to watch the performance.
He seemed delighted and afterwards described Russia - one of the few countries he has never been able to visit because of opposition by the Russian Orthodox Church - as a land especially dear to him.
...but on Friday they even sang a Polish song for the pontiff.
Although these days he is often almost unable to speak because of the growing effects of Parkinson's Disease, Pope John Paul, the third-longest reigning pope in history, continues to receive distinguished visitors and to officiate at Vatican ceremonies.
The head of the billion-strong Church says he has no intention of stepping down.
Unlike last year, when there was a week of official celebrations to mark the 25th anniversary of his election as pontiff, this year it is business as usual at the Vatican - except for the Red Army song and dance show.