Tunisia is aiming to restore faith in its tourism sector by reopening the National Bardo Museum less than a week after a jihadist attack there that killed 20 foreigners.
Museum officials said Tuesday's reopening, which will be marked with a ceremony, was "a message" to the gunmen who killed the tourists and a police officer there last Wednesday.
"It's a challenge but also a message... we want to show that they haven't achieved their goal," museum curator Moncef Ben Moussa said.
The museum is due to reopen with a ceremony organised by the culture ministry, including a concert by the Tunis symphony orchestra.
Tunisia fears that last week's carnage claimed by the Islamic State group - the deadliest assault on foreigners in the North African country since 2002 - will hit its vital tourism sector.
In a move aimed at restoring confidence, Prime Minister Habib Essid sacked the heads of police for Tunis and the area around the museum, after finding "several deficiencies" in security.
Essid, himself a former interior minister, "decided to fire a number of officials including the Tunis police chief and the police chief for the Bardo".
A policeman in charge of security at the museum has been arrested, judiciary spokesman Sofiene Sliti said, without disclosing the charges.
The Bardo attack was the first claimed by IS in Tunisia after the militant group's apparent expansion to strife-torn Libya from its Syria and Iraq strongholds.
With feeble growth and a graduate unemployment rate of 30 per cent, Tunisia relies heavily on tourist income.
