Thieves hit the jackpot when they cracked the basement safe of elderly jeweller Alberto Velho, 84.
While the retired man slept peacefully upstairs, they made off with up to €1 million in gold, silver and ‘precious banknotes’.
It is yet another case of someone keeping valuables at home, and waking up to find them all gone.
Just before Christmas, a 79-year-old man from Gondômar lost a similar amount of money from his homemade vault in the garage.
The latest heist, from the village of Águas Santas, in Maia, is now being investigated by police.