It was a mural dedication 250 years in the making for some Allentown students.

South Mountain Middle School debuted its brand new mural celebrating Allentown's 250th birthday.

Congressman Charles Dent and Allentown Mayor Ed Pawlowski joined Allentown school officials for the big reveal.

Teacher Karol Kleppinger and 16 students put in 200 volunteer hours to bring the mural to life.

The 61 foot by 8 foot mural was the vision of local artist Rosemary Gessick.