Zeicher Lechurban in Jerusalem

Do people in Jerusalem need to leave an empty, unpainted space Zeicher Lechurban or not, since they see it every day?

Answers from Igud members: Rav Duvid Katz shlit”a, Rav Yosef Yitzchak Serebriansky shlit”a and Rav Tzvi Mauner shlit”a
Answers from others: Rav Avigdor Nebenzahl shlit”a, Rav Shlomo Aviner shlit”a, Rav Yosef Lieberman shlit”a and others

Igud Halacha Challenge Elul 5778