The signage comprises green double sided banners and stainless steel lettering.
Melanie Odell MBE, president of the museum, said: "This project is so valuable for the future of the museum, by effectively branding our iconic building and providing a strong sense of place on the High Street.
"We are so grateful for the professional services of Mike Cashman of Far Post Design, who has taken us through the whole process from design and planning to installation."
Town council clerk Lisa O’Sullivan said: "We recognise all the work of the museum and the value that they bring to the town with their constantly changing programme of events.
"To be able to raise more awareness and attract more visitors is a real positive for the town council."
The museum’s board of trustees is prioritising increasing awareness of the museum, along with promoting the building’s services.