It's a TV show broadcast in more than 120 countries, and it's made right here in Wales.
Da Vinci's Demons tells the early life of Leonardo da Vinci, portraying him as both inventor and adventurer.
Now in its third series, it's filmed in Swansea.
Watch the report from Mike Griffiths below
The show's home is the massive former Ford and Visteon car parts factory, situated off Fabian Way.
Da Vinci's Demons began filming at the site in 2012, turning it into 265,000 square feet of shooting space.
Production designer Edward Thomas, whose credits include Doctor Who and the recent Dylan Thomas biopic Set Fire to the Stars, was instrumental in bringing the series to Swansea.
It's not just filmed indoors, with the local countryside and coastline doubling up for more exotic locations.
For Tom Riley, who plays Leonardo, it's become a second home.
Watch our extended interview with Tom Riley below:
But it's behind the camera where others get a chance to shine.
Alys Bevan got involved after doing an art foundation course nearby.
She's still studying, but also getting paid work on the production.
More than 100 students and graduates have taken part in the show's education project, where their artistic and technical skills are put to good use.
It's estimated that the show has created around 200 full-time jobs in the Swansea Bay area.
The new series will be shown in 2015.
The team behind it hope it'll run for many more years to come.