Symbolism continued to have a hold on the minds of Anglo-Saxon people into the Christian eras. The interiors of churches would have glowed with colour, and the walls of the halls were painted with decorative scenes from the imagination telling stories of monsters and heroes like those in the poem "Beowulf". Although nothing much is left of the wall paintings, evidence of their pictorial art is found in Bibles and Psalters, in illuminated manuscripts. The poem "The Dream of the Rood" is an example how symbolism of trees was fused into Christian symbolism.