All of my Blu‑ray discs are Region‑Free (Region 0).  

They are fully compatible with Blu‑ray players worldwide, including the United States, Europe, the UK, Australia, and Asia.

Blu‑ray technology does not use NTSC or PAL, so there are no format issues when playing them in Europe or any other region. As long as your Blu‑ray player supports standard Blu‑ray formats (which all modern players do), the disc will play normally.