Original: From Rome, Cimabue went to Assisi to paint several large frescoes at the newly-built Basilica of St Francis of Assisi, and it is probable, but not certain, that Giotto went with him.
Simplified: From Rome, Giotto's teacher Cimabue went to Assisi to paint several large frescoes at the "Upper Church" of the newly-built Basilica of St. Francis of Assisi.