The Sororium Tigillum, which translates as the "sister's beam", was a wooden beam said to have been erected on the slope of the Oppian Hill[1] in Ancient Rome by the father of Publius Horatius, one of the three brothers Horatii. Publius Horatius was required to pass under the beam, as if under a yoke, following the decision of the people's assembly not to punish him for the murder of his sister.

According to Livy,[2] writing at the end of the 1st century BC, the Sororium Tigillum[3] remained intact in Rome until his day, having been maintained at the public expense.


  • Livy, Ab urbe condita, 1:26
  • CIL 6.32482
  • Platner, S. B, and T. Ashby. 1929. "Tigillum Sororium.[4]" In A Topographical Dictionary of Ancient Rome. Oxford: Clarendon Press.


  1. ^ John Henry Parker (1883). The Via Sacra. Excavations in Rome from 1438 to 1882. J. Parker. pp. 60–.
  2. ^ Liv. 1.26
  3. ^
  4. ^