Worshippers said construction of the building had been rushed.

"We are united in the blood of our martyrs," Pope Francis said.

The nativity seen should remind us of the marginalized, the pope said.

Lawmakers from both parties faced huge pressure to act against Park.

The bishop said contemporary society was "showered with random data" and often showed a "frightening superficiality towards moral issues."

The four-page letter offers a "pastoral reflection" on the challenges the assisted-dying law.