This is Uppsala Cathedral in Uppsala, Sweden

The picture was taken during their "Festival of Light"

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This is the largest and tallest cathedral in Scandinavia. Construction on the cathedral began around 1270, with consecration taking place in 1435. The church towers were added at a later time period. No one knows what the medieval cathedral looked like at the time of its consecration. There are no known drawings still in existence. The cathedral has undergone several major renovations. Sweden left the Roman Catholic Church in the 1500s and this had a major impact on the appearance of the cathedral during various periods.

The cathedral is also a royal burial site. For example Johan III and Gustav Vasa (also known as Gustav I) and his queens are buried here. Several famous scientists are also buried here alongside royal personages. Burials in the cathedral ceased at the end of the 18th century but an exception was made in 1931 when Archbishop and Nobel Peace Prize Laureate Nathan Söderblom was buried in the high chancel of the cathedral.

Here's another picture from a different angle