**Ss. Proti et Hyacinthi Martyrum** refers to **Saints Protus and Hyacinth**, who were Christian martyrs during the persecution of Emperor Valerian around **257–259 AD**¹². They are venerated in the Catholic Church, Coptic Orthodox Church, and Eastern Orthodox Church.
**Protus** and **Hyacinth** were brothers who served as chamberlains to **Saint Eugenia**. They were baptized along with her by **Helenus, Bishop of Heliopolis**. They devoted themselves to the study of sacred scripture and lived with the hermits of Egypt before accompanying Eugenia to Rome.
In Rome, they were arrested for their Christian faith. Despite being given the opportunity to renounce their faith, they refused to do so. As a result, they were subjected to severe scourging and ultimately beheaded on **September 11**. Their steadfastness in maintaining their faith in the face of persecution led to their martyrdom and subsequent veneration as saints. Their graves were later discovered in the **Catacomb of St. Hermes** on the **Via Salaria**.
Their graves are mentioned in the "Depositio Martyrum", in the chronographia for the year 354. The graves were located in the **Coemeterium of Basilla** on the **Via Salaria**, later known as the **Catacomb of St. Hermes**. In 1845, the still undisturbed grave of St. Hyacinth was discovered in a crypt of this catacomb.
Their feast day is celebrated on **September 11** in the Roman Catholic Church.
¹: [Protus and Hyacinth - Wikipedia](^1^)
²: [Sts. Protus and Hyacinth | EWTN](^2^)
(1) Protus and Hyacinth - Wikipedia. https://en.wikipedia.org/wiki/Protus_and_Hyacinth.
(2) Sts. Protus and Hyacinth | EWTN. https://www.ewtn.com/catholicism/saints/protus-and-hyacinth-446.
(3) Protus and Hyacinth - Wikipedia. https://en.wikipedia.org/wiki/Protus_and_Hyacinth.
(4) Sts. Protus and Hyacinth | EWTN. https://www.ewtn.com/catholicism/saints/protus-and-hyacinth-446.
(5) PROPER OF THE MASS (comm0911.htm) - dailycatholic.org. http://www.dailycatholic.org/issue/12Sep/comm0911.htm.
(6) MASS PROPER: SEPTEMBER 11, STS. PROTUS & HYACINTH, MARTYRS INTROIT .... https://extraordinaryform.org/propers/0911StsProtus&HyacinthMartyrs.pdf.
