1)
What is "Keres"?
1.
Rashi: It is a high Tikrah (ceiling), prepared like a chair for Zekenim of the city to sit on it.
2.
Ibn Ezra: It is the Kiryah (city).
2)
What do we learn from "ba'Rechov"?
1.
Rashi: It was when I prepared my seat in the street [Malbim - where the Chachamim sit and judge. I had great honor!]


