Cardinal Castrillon Hoyos died yesterday. He deserves our prayers.
He was President of the Pontifical Commission Ecclesia Dei over the period of the promulgation of Summorum Pontificum, obviously a very important time for those attached to the Traditional Mass.
In the photograph below, he is blessing delegates at the Foederatio Universalis Una Voce during the General Assembly of 2013; below that he is celebrating Mass for them in the Blessed Sacrament Chapel of St Peter's in Rome in 2011. That was the first time a Cardinal has celebrated the ancient Mass in St Peters since the liturgical reform.
There is an obituary of him on Rorate Caeli.
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But I think at least Cardinals Burke and de Paolis (+) have celebrated Mass in the Blessed Sacrament Chapel (solemnly to boot). And Cardinal Brandmuller celebrated Mass at the altar of the throne for the October pilgrimage one year.