Final answer:
The tone of 'The Haunted Palace' transitions from a bright and grandiose beginning to a dark and somber end, reflecting the palace's fall from grace.
Step-by-step explanation:
The tone of Edgar Allan Poe's The Haunted Palace shifts significantly throughout the poem. Initially, the tone is majestic and harmonious, indicative of a stately palace thriving with beauty and life. This is evidenced in the lines describing "banners yellow, glorious, golden" which contribute to a resplendent and bright atmosphere. However, as the poem progresses, a shift occurs toward a darker, more somber tone. Phrases like "evil things, in robes of sorrow" illustrate the palace's descent into despair and decay, changing the initial tone of grandeur to one of lament and gloom.