- Bishop: The Hôtel-Dieu - the oldest hospital in Paris. Centuries older than the famous Notre-Dame Cathedral, which is down the street. Hospitals as we know them haven't exactly been invented yet, so you're more likely to get sick inside than to leave cured. The Templars are using the building's sewers to smuggle out artifacts they stole from Notre-Dame. Go in and get the goods.
The Assassins recovered the artifacts from the sewers beneath Hôtel-Dieu and then escaped the area.