Introduction:
In Samuel Taylor Coleridge's poem "The Rime of the Ancient Mariner," the poet says, "instead of the cross, the albatross was hung around his neck." This line refers to the mariner's burden and the consequences of his actions. The albatross symbolizes guilt, punishment, and the weight of sin that the mariner must carry.

Explanation:
1. Symbolism of the Cross:
The cross is a symbol of Christianity and represents redemption, forgiveness, and salvation. It is associated with Jesus Christ's sacrifice for humanity's sins. By saying "instead of the cross," the poet suggests that the mariner is burdened with something other than the traditional symbol of salvation.

2. Symbolism of the Albatross:
The albatross is introduced into the poem as a bird of good omen, bringing favorable winds to the ship. However, the mariner inexplicably shoots the albatross with his crossbow, killing it and bringing a curse upon himself and the crew. The albatross then becomes a symbol of guilt and sin, representing the mariner's transgression against nature and divine order.

3. The Mariner's Punishment:
After killing the albatross, the mariner is haunted by its presence. He is forced to wear its carcass around his neck as a constant reminder of his sin. This punishment is both physical and psychological, as the weight of the dead bird becomes a burden that the mariner must bear.

4. The Albatross as a Metaphor:
The albatross also serves as a metaphor for the consequences of human actions. Just as the mariner's impulsive act brings calamity upon the ship and its crew, our own thoughtless actions can have far-reaching effects on the world around us. The albatross serves as a warning against the disregard for nature and the interconnectedness of all living beings.

Conclusion:
By saying "instead of the cross, the albatross was hung around his neck," the poet emphasizes the mariner's guilt and the weight of his sin. The albatross symbolizes the burden of his actions and the punishment he must endure. Through this powerful imagery, Coleridge explores themes of guilt, redemption, and the consequences of human actions.