Pope Francis remained in critical condition Sunday and blood tests show early kidney failure but he remains alert and “well-oriented,” and attended Mass, the Vatican said, as the 88-year-old pontiff battles pneumonia and a complex lung infection.

Chicago-area Catholics gathered at Holy Name Cathedral on Sunday to pray for the health of Pope Francis, who remained in critical condition with double pneumonia.

Pope Francis returned to social media more than a week after he was hospitalized and diagnosed with double pneumonia, and remains in critical condition.