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 a huge building and the space just allows us to build huge sets, leave sets up, which is ideal because the writers can write for those sets. You're not wasting money taking sets down and storing them and putting them back up.
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.
It feels like a family. We've got people who've been here from the very beginning... not just the cast but crew members. You look forward to coming back and seeing them.
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.
There are a lot of people from different industries that are all coming together here and working hard, as well as students like myself who participating here and are encouraged to come in. They encourage you to start off in the art department and they show you everything they have to offer there, but then they also have the more practical side.
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.
We're getting students coming out of college with this really high skillset which is perfectly adapted to working with the industry. If you can combine those skills with an experience of working in the industry as well you've got crews ready to go, and that's really important for the future of film and television 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.