Calgary firefighters put out a blaze in the Pain Block on Stephen Avenue Walk on Tuesday morning.

The affected structure is the only wooden building downtown to have survived the city's " great fire of 1886 ."

Fire crews responded just before 9 a.m. to the 100 block of Eighth Avenue S.W., where they saw smoke and flames coming from the back alley side of the two-storey souvenir shop Canadian Impressions.

No one was inside the building at the time of the fire, a release said.

The bulk of the fire damage happened on the back side of the building, facing the alley, according to Alex Kwan, a public information officer with the Calgary Fire Department.

Firefighters responded to a structure fire on the 100 block of Eighth Avenue on Tuesday morning. (Calgary Fire Department)

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