The Democratic National Convention in Philadelphia next week is expected to draw a big crowd, including more than 4,000 delegates, to the Wells Fargo Center to witness and celebrate the nomination of Hillary Clinton as the party’s presidential candidate. But the largest crowds gathering outside of the venue are shaping up to be pro-Bernie Sanders demonstrations.

Permits for nine rallies hosted by Sanders supporters, between Sunday and Friday, have been approved by the city of Philadelphia. Several of the events are expected to attract thousands, and in some cases tens of thousands, of participants.