Theatre Royal

The Theatre Royal, also known as the Covent Garden, and eventually the Royal Opera House, was a theater within the city of London.

In the year 1754, a musical known as The Beggar's Opera was performed as a revival here, where the Templar Haytham Kenway performed an assassination to obtain a precursor necklace.

History
Opened in the year 1732, the Theatre Royal was the home of many famous performances, some including musical pieces by Handel, as well as several opera's, dances, and even acrobatics. The building was mostly known for its presentations of plays, at least for the first hundred years of its existence, because King Charles II had given it exclusive rights to hold spoken dramas within London.

Later, in the year 1808, the original building was destroyed in a fire. After being rebuilt, it burned to the ground once more in the year 1857 - finally being completely renovated in the 1990's, with smoke alarms being installed and other various safety measures taken account of.

Assassination
In the year 1754, Haytham Kenway met with his Templar master, Reginald Birch, planning the murder of someone they saw as a foe. Located in a third floor booth, closest to the stage on the right, the man was watching the musical. Haytham, after stealthily scaling the walls and lock-picking his way to the room, stabbed him in the back through his chair, and stole his precursor artifact. As he left, most of the other civilians within were evacuated, and some people ended up leaving the city.

Reference

 * ''Assassin's Creed III