Mahasi Sayadaw
In the 1960s, after the sixth Buddhist council had given Mahasi Sayadaw an eminent role in the Buddhist meditation revival, he was invited by the Sri Lankan government to train, teach and help establish vipassana meditation centers in Sri Lanka. At that time a group of already well known meditation monks received the opportunity to privately train and practice with Mahasi Sayadaw. Among those was the Venerable Matara Sri Ñāṇārāma Mahathera.