The fall of Constantinople and its destruction is a striking example of the awful punishment meted out by God to those who sin against the Holy Spirit.
The Greeks, led by their Patriarchs Photius and Cerularius, denied the divinity of the Holy Ghost and, after apparently renouncing their error, fell back into the same sin. They were threatened by Pope Nicholas V with God's anger if they did not repent. This they obstinately refused to do.
Three years later, in 1453, Mahomet II, at the head of a formidable Moslem army, surrounded the city and after fierce fighting defeated the Greeks and captured Constantinople--this, on the very feast of the Holy Ghost. Fearful massacres, pillage and fires lasted three whole days, reducing the inhabitants to an awful plight. Mahomet, on the fourth day, entered the city, took possession of the Imperial Palace and turned the cathedral into a mosque. Constantinople has since then lain under the yoke of the Turks for over 500 years.
Almost deja vu-ish...an atheistic socialist-ish America and 9/11 and the mosque.
The Purpose of Pentecost: and the New Missionary Age of the Church
Pentecost: the Holy Spirit Comes
Pentecost on Mount Athos (where earthly time is one and the same as the eternal today of heaven)
Vigil of the Pentecost and Whitsunday
The Gifts of the Holy Spirit
The Twelve Fruits of the Holy Spirit [Devotional]
Novena to the Holy Ghost [Holy Spirit]
The Holy Spirit: Pentecost
The Church's First Novena
Litany of the Holy Spirit for the election of a holy pope.