The feast of the Chair of Saint Peter at Rome has been celebrated from the early days of the Christian era on 18 January, in commemoration of the day when Saint Peter held his first service in Rome. The feast of the Chair of Saint Peter at Antioch, commemorating his foundation of the See of Antioch, has also been long celebrated at Rome, on 22 February.
At each place a chair (cathedra) was venerated which the Apostle had used while presiding at Mass. One of the chairs is referred to about 600 by an Abbot Johannes who had been commissioned by Pope Gregory the Great to collect in oil from the lamps which burned at the graves of the Roman martyrs. — New Catholic Dictionary
1900 MASS (Live stream - http://ustre.am/UCOl )
My apologies for the Sparseness of the blogs lately, I seem to have got out of the habit, but with lent coming I will try and be a bit more diligent.