The note explains: Güneşim. Ben Prens Tarpa fırtına tanrısının yardımıyla […] Wali kentini ele geçirdim, ben Prens Tarpa bu steli fırtına tanrısının adadım. Google translate makes a bit of a mess of this, but I think it reads as “My sun. I am Prince Tarpa. With the help of the god of storms [...] I captured the city of Wali. I - Prince Tarpa - have devoted this stele to the god of storms.”

This so-called ‘Kocaoğuz stele’ was found about 50 km to the west of the city of Afyon. It was re-used in a Roman time structure, thus the original location is unknown. The granit block is about 2 meters tall, 0.5 meter wide, 0.25 meter thick, and weighs about 800 kg. Below a winged sun disk, there is the mentioned five-line inscription.
Assuming that the stele originates from a nearby location, lack of Neo-Hittite period monuments in this region may suggest that this stele dates to Empire period, although contrary opinions exist due to stylistic and contextual reasons. The sun-disk is unusual in shape in comparison to other Empire period representations and the person and place names are not known from Empire period written sources. It may be a product of the transition period during 12th to 11th centuries.

Correspondent: J.M.Criel, Antwerpen.
Source: Website of ‘hittitemonuments.com’ .

A leaflet from the museum I have gives the 14th century