Bill Cosby -- Spelman College ... We Still Have Your Back

Bill Cosby may have lost some concert dates here and there, but he's not losing the support of Spelman College ... the institution he has richly funded.

An official from Spelman -- which received a $20 million gift from Cosby and his wife Camille -- tells TMZ they have not had a single conversation to change anything regarding Cosby's relationship with the college in the wake of the torrent of sexual assault allegations.

The school dedicated a 69,000 square foot facility to the Cosbys -- the Camille Olivia Hanks Cosby, EdD Academic Center.

The school, which also established the William and Camille Cosby Endowed Professorship Program, notes the Cosby gift was made more than 25 years ago and the relationship is cemented.

Cosby famously gave the commencement address at Spelman in 2006.