Supporters of electoral reforms pressure group Bersih can contribute "keys of freedom" for its detained chairperson Maria Chin Abdullah, by contributing to a mobile monument to commemorate the group's 10th anniversary.

Initiated by landscape architect Ng Sek San, the campaign, dubbed Projek Kunci Kebebasan (Freedom Keys Project), seeks thousands of unused keys from Bersih supporter.

Participants are required to visit the ongoing candlelight vigils for Maria and attach the keys onto a panel that would be used for the project.

After attaching the keys, contributors are urged to share a photo of their key on social media networks with the hashtag #kuncikebebasan.

According to the project website, the monument will be portable so it can tour across Malaysia.

"The gallery containers housing the monument can be used as an exhibition space to tell the Bersih story.

"We will look for a public square to install the monument permanently as a symbol of democracy and the people's effort to build a better Malaysia," read the website.

According to project's Facebook page, opposition leader Dr Wan Azizah Wan Ismail and Maria's three sons have contributed keys to the project.

At the time of writing, the project website states that at least 140 keys that have been contributed. The project was launched yesterday.

Bersih was launched in 2006 as an opposition party platform to call for electoral reforms. The group made its mark by organising the first Bersih rally in 2007.

It was re-launched in 2010 as a non-partisan NGO collective and remains Malaysia's most prominent electoral reforms pressure group.

In 2013, Ng's art installation project 'Malaysian Spring', featuring colourful flags, took on a life of its own in the lead up to the 13th general election when pro-Pakatan Rakyat supporters pitched similar small flags on patches of grass throughout the country.