Knoxville?s premier free outdoor concert series is back! Sundown in the City returns to Market Square in April. Sundown in the City began with a single concert on Market Square in 1997 and has grown over the years to a weekly event that attracts thousands of people to Knoxville?s center city. The series has been cited as one of the major catalysts in helping to spark Knoxville?s growing downtown revitalization. Last year?s concerts drew capacity crowds estimated at 8,000?10,000 people every Thursday evening, beginning at 6:00 p.m.