'Game of Thrones'
A poster of "Game of Thrones" season 7. Lena Headey as Cersei Lannister and Nikolaj Coster-Waldau as Jaime Lannister Helen Sloan/HBO

Filming for “Game of Thrones” season 8 may have begun, but the construction of the sets continue. Leaked pictures from the production set in Northern Ireland show a castle set currently being built. The following article contains minor spoilers.

Leaked pictures posted on Watchers on the Wall show the construction of a castle in a location next to Painthall Studios in Belfast. There were no sigils here, so it’s difficult to say which House it belongs to.

More pictures have been posted in another report by Watchers on the Wall. In addition to the castle set, there’s a tower being constructed. More details about it and its significance may be revealed in the coming weeks when pictures of filming surface online.

Some of the leaked pictures also show the construction of a trebuchet. The report notes that the presence of this weapon suggests that an action sequence may be filmed soon. Trebuchets are siege weapons used to bring down a castle. Since the Night’s King may not be using these weapons in the fight against the North, this may be something that will be used by Cersei’s (Lena Headey) forces to capture the lands in the south.

Filming in this location is said to be scheduled during the night. With winter finally arriving in Westeros, the final season is expected to be darker in tone. Winters in the fantasy world lasts for years. During this time, there won’t be sun, and there may be children who will live their entire lives in darkness. This is often referred to as the long night.

The producers are yet to announce a release date for “Game of Thrones” season 8. There will only be six episodes in this final instalment of the popular TV series.