A museum devoted to Spanish sculptor Eduardo Chillida's monumental works re-opens on Wednesday in the northern Basque Country, eight years after the financial crisis forced it to close its doors.

And its new Swiss backers have pledged to get his work a wider following around the world.

Around 40 of Chillida's steel and stone sculptures are on show in the grounds of the museum in the town of Hernani, with others displayed at a traditional Basque 16th-century farm.

'Searching for Light I': many of the giant sculptures are scattered around the grounds of the museum / © AFP

Regarded as one of the leading sculptors of his time, Chillida was known for his colossal abstract forms.

Before he died in 2002 aged 78 in his hometown of San Sebastian, he and his wife set up "Chillida Leku" (Basque for The Place of Chillida) in nearby Hernani. Today, it is a private museum owned by the family, director Mireia Massague told AFP.

To mark the re-opening, the museum is hosting a retrospective charting Chillida's artistic journey from the 1940s to 2000.

It brings together 90 of Chillida's iron, granite, alabaster, plaster and paper works for the occasion.

Another exhibition will be devoted to "The Comb of the Wind" sculptures that have been braving the elements in San Sebastian's Concha Bay since 1977.

'Knot XXII': To mark the reopening, the museum has organised a retrospective featuring 90 of Chillida's works made from a range of materials / © AFP

Chillida inaugurated his museum in 2000 in the presence of hundreds of guests including then king Juan Carlos and German Chancellor Gerhard Schroeder.

But the museum's struggles to make ends meet were exacerbated by the financial crisis, and it closed in 2011. While Chillida enthusiasts were still able to visit, it was only on appointment.

The re-opening to the general public was made possible thanks to private funding from the powerful Swiss gallery Hauser & Wirth, which reached a deal with the family to manage the estate.

Chillida himself remodelled the 16h-century Basque farmhouse that houses some of the collection / © AFP

"Our decision isn't only philanthropic," Iwan Wirth, co-founder of the gallery, told the El Pais daily.

"The work of Chillida is admired in Europe and Japan and has huge potential to be even more admired in the United States and in the rest of Asia," he said.

"But compared to that of other big artists, we think it's still under-valued."

Massague, meanwhile, said the Chillida Leku museum -- coupled with Bilbao's Guggenheim Museum and the Botin Centre in Santander -- could contribute to making northern Spain an important draw for art-lovers.