Inside Mằng Lăng Church in Phú Yên, the first book printed in Quoc Ngu by Father Alexandre de Rhodes is still preserved.
Centennial Mằng Lăng church where the first Quoc Ngu books are kept












Source: Quỳnh Trần/Vnexpress
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Reference: Travel Handbook Mytour
MytourJune 8, 2018