Bardo Museum in Tunisia’s capital is due to reopen less than a week after gunmen killed at least 22 people, mostly European tourists.
A concert and a public rally are expected, with museum officials saying they want to show the world that the gunmen “haven’t achieved their goal”.
There are fears the attack – claimed by Islamic State (ISIS) – will hit Tunisia’s vital tourism industry.
Habib Essid’s office said he had noted several security deficiencies during a visit to the museum, which houses a major collection of Roman mosaics and other antiquities.
Two of the gunmen were killed by the security forces during last Wednesday’s attack, while a third is on the run, officials said.
The attack was the deadliest in Tunisia since the uprising which led to the overthrow of long-serving ruler Zine al-Abidine Ben Ali in 2011.
Suspects have been arrested over the attack but just two gunmen were thought to have raided the museum.
They are said to have been trained in Libya in an area controlled by ISIS militants.
[youtube oq_FbChcRJQ 650]