The excellent magistrates took the advice, not caring, perhaps, to fulfil any longer the dangerous but not dignified functions of police officers.
Before departing, they adopted the precaution of closing all the doors of the church, leaving a single one open, that the rabble still remaining might have an opportunity to depart.

It seemed not to occur to the senators that the same gate would as conveniently afford an entrance for those without as an egress for those within.

That unlooked-for event happened, however.

No sooner had the magistrates retired than the rabble burst through the single door which had been left open, overpowered the margrave, who, with a few attendants, had remained behind, vainly endeavoring by threats and exhortations to appease the tumult, drove him ignominiously from the church, and threw all the other portals wide open.
Then the populace flowed in like an angry sea.

The whole of the cathedral was at the mercy of the rioters, who were evidently bent on mischief.