The Senate at the time was meeting in Pompey’s theater.....
“We always knew that Julius Caesar was killed in the Curia of Pompey on March 15th 44 B.C. because the classical texts pass on so, but so far no material evidence of this fact, so often depicted in historicist painting and cinema, had been recovered,” Antonio Monterroso, a researcher at the Spanish National Research Council, said in a statement.
Classical texts also say that years after the assassination, the Curia was closed and turned into a memorial chapel for Caesar. The researchers are studying this building along with another monument in the same complex, the Portico of the Hundred Columns, or Hecatostylon; they are looking for links between the archaeology of the assassination and what has been portrayed in art.
“The Curia of Pompey, sometimes referred to as the Curia Pompeia,[1] was one of several named meeting halls from Republican Rome of historic significance.[2] A curia was a designated structure for meetings of the senate.[3] The Curia of Pompey was located at the entrance to the Theater of Pompey. While the main senate house was being moved from the Curia Cornelia to a new Curia Julia, the senate would meet in this smaller building. It is best known as where members of the Roman Senate murdered Gaius Julius Caesar.[2] It was attached to the porticus directly behind the theatre section and was a Roman exedra, with a curved back wall and several levels of seating.[1] In “A New Topographical Dictionary of Ancient Rome” by L. Richardson, Jr., Richardson states that after Caesar’s murder, Augustus Caesar removed the large statue of Pompey and had the hall walled up. Richardson cited Suetonius that it was later made into a latrine, as stated by Cassius Dio.[4]”
https://www.livescience.com/23900-julius-caesar-assassination-place-discovered.html
Interesting!