“Secret Baptism of Jewish Children” issued by King Manuel of Portugal 3/19/1497 [Kingdom of Portugal; Present-day Portugal] [Unconfirmed]
Commentary from other sources:
1) “King Manuel I, in an effort to prevent Jews from fleeing the persecutions, secretly ordered the baptism of all children between the ages of four and fourteen.”
“1497 March 19, PASSOVER IN PORTUGAL;” jewishhistory.org