Dorylaion is an ancient Phrygian settlement that remains in the Eskişehir city center today. Almost all of the inscriptions found are graffiti incised on sherds (few containing more than a letter). Only two stone inscriptions (NW-01 and NW-02) have been found. All inscriptions are dated to the Late Phrygian period.
Inscription NW-01
It is an unpublished inscription of only a few characters on the upper face of a stone with a horse rider relief. The stone is in the Eskişehir Museum.
Inscription NW-02
The sandstone slab was found in 2017 during the Şarhöyük (Dorylaion) excavations among the stones in the foundation of a Hellenistic building. The single-line Old Phrygian inscription on the stone is written sinistroverse. It is dated to the 6th or 5th centuries BCE.

← [..] iman ( umnip̣ [..]
References:
Baştürk, M. B. & Avram, A. 2019. ‘A Newly Discovered Old Phrygian Inscription from Şarhöyük (Dorylaion)’, Ancient West & East 18, 231-239.
Obrador-Cursach, B. 2018. Lexicon of the Phrygian Inscriptions, Thesis, Barcelona.
Image Sources:
M. B. Baştürk & A. Avram, 2019