In this article five unpublished Greek inscriptions from Bithynia which date from the Roman Imperial Period are presented. All the inscriptions commemorate a death and four of them are written on altars and the other one is on a stele. The first three inscriptions are from the territory of Nikaia and the others from Modrena. Copies and photographs of the inscriptions were taken by Prof. Dr. Sencer Şahin in the 1980s when he was surveying in the region. Information concerning those inscriptions was obtained from the notes which were taken by him at that time. The translations of the incriptions are as follows: 1.“In the sixth year Hermione built this tomb for her husband Timotheus, who lived for 39 years, and also for herself”. 2. “Aristoteles the son of Alexandros built this tomb in memory of Aristotele daughter of Demosthenes who lived for 50 years and for his brother Demosthenes who lived for 30 years and for his brother Aristoteles who lived for 15 years”. 3. “Priscus son of the Isidorus, built this tomb for himself, for his wife Hieronis, daughter of Hieron, and for his offspring. It must not be sold to anyone. Whoever sells it, he will pay a fine of 2.500 denaria to the city. Farewell”. 4. “Asinius Glaucus who lived for his honour built (this tomb) for himself, for his wife Euposia, for Gaius Valens Bathyllus and for his daughter Asinia Tyche. It is not to be sold. Farewell”. 5. “Publius Aelius Marcianus, Publius Aelius Rufus and Publius Aelius Firmus built (this tomb) in memory of their father Publius Aelius Rufus and their mother Octavia Longina. Farewell”.