Court is located in France, but the case originated in the UK. But British courts had already ruled the same way (see below).
"The court, located in France, ruled on several cases of religious freedoms, including the appeal of Lilian Ladele, an employee of the Borough of Islington in London who was fired after she refused to register gay couples seeking civil partnerships, reports Bloomberg"
"The court also ruled against Gary McFarlane, a Bristol-based marriage counselor fired after refusing to work with same-sex couples. McFarlane also claimed religious discrimination. But as with Ladele's suit, the Court sided against McFarlane when it said same-sex couples' rights were protected under the European Convention on Human Rights, and that religious belief was not a strong enough reason to infringe on those rights, according to Think Progress' report on the ruling. Therefore, the court concluded that there had been no religious discrimination in McFarlane's case.
Ladele, McFarlane and the two other claimants, Nadia Eweida and Shirley Chaplin, had moved their cases individually to the European Court of Human Rights after losing in the British judicial system, according to CNN. The European Court of Human Rights decided to hear their cases together."