October 2, 1473 – Turkish invasion of the Celje area
The problems brought about by new economic and political developments on the old continent in the 15th century were further exacerbated by the Turkish threat. As early as 1408, the Turks invaded one of the Slovenian lands at Metlika for the first time, and as early as 1415, they invaded Styria twice. However, the situation quickly calmed down. However, when the Turks subjugated Bosnia in 1463, the situation became much more tense. As early as 1469, the Turks invaded Carniola again at Metlika, and this began a long period of Turkish invasions that caused enormous damage to our lands.  
In 1472, they invaded Styria again and caused enormous damage between Maribor and Ptuj. While Celje and its surroundings were spared that year, things were completely different a year later. This was the first time that a Turkish attack had covered all three Inner Austrian provinces (Carinthia, Carinthia and Styria). As early as 23 September 1473, the Turks had penetrated past Žužemberk and Trebnje towards Ljubljana, which they avoided, as their goal was to plunder the still untouched areas of Carinthia. After three days of raiding, they unexpectedly appeared in front of Železna Kaplo, where they were met by poorly armed defenders. The Turks were stronger and the plundering of Carinthian villages and markets began, which lasted until the end of September. After they plundered Carinthia, they began returning in two groups through Styria, "equipped" with around 2,000 prisoners, all kinds of livestock, and horses loaded with loads, past our region, towards the southeast.
How the multitude of Turks and prisoners moved past Celje is clearly shown to us by Ignac Orožen in the Celje Chronicle (he greatly exaggerates the number of prisoners), who says: "In 1473, the Turks invaded Lower Styria from Carinthia, and spent the night in Slovengradec on the first day. From there, one group went through Vitanje to Konjice, where they cooked lunch in a farof; the other group with the faithful Christians rushed through a serious hole into the Šaleška valley, destroyed the Šuštane castle, and then on Saturday, October 2, from 8 am to 4 pm, with 8,000 faithful Christians, passed Celje in an unbroken procession. Both groups then spent the night in Šentjur pod Rifnik."

Branko Goropevšek, M.A.

More at the link: http://ook.knjiznica-celje.si/zgodilo/Turki.htm