Leyton Sixth Form College hosted a 50-year reunion for former grammar school students.
The building now used for the sixth form college used to be home to Leyton County High School for Boys, a grammar school for 11 to 18-year-olds.
It became Leyton Senior High School for Boys in 1968, catering for 14 to 18-year-old boys, and a sixth form college in 1993.
Former students who started at the grammar school in 1963 attended the reunion.
Dawn Hamilton-Barrett, vice principal at the sixth form college, said: “For most of the group, it was the first time they had seen the result of the recent £40m site redevelopment and many commented on how well the best of the original college buildings blended with our new facilities.”