Letter of Radu cel Frumos dated between 1463-1470 from the archives of Brașov (yes, I have translated it last year). I found it while ago and I just loved his beautiful signature of Radu and added the translation. I’m becoming an expert of Radu! Yes!
“Iw Радул вwєвода милостïѧ божиѧ господинь”
“I am Radul voivode, by the grace of God, the ruler”