Slavyanskaya Square and Varvarka Gates Square form one area. The boundary where one ends and another begins is not clearly defined. They were divided only in 1992, and before that they were both called  Nogina Square. Slavyanskaya Square (eastern half) is in the place where the monument to Saints Cyril and Methodius, Slavic educators, is situated. Here an annual celebration of Slavic literacy and culture is conducted.

Church of All Saints na Kulichkakh, Slavyanskaya Square.

The monument to Saints Cyril and Methodius.

Varvarka Gates Square is named after the gate in Kitaygorodskaya wall, through which you can get to the road now called Varvarka Street. There were also Ilyinskiye and Nikitskiye gates, respectively Ilyinka and Nikitskaya streets. The wall together with the gates was demolished in 1934.  

Varvarskaya Tower and gates.

Varvarskaya Square nowadays. In the left part of the picture you can see Delovoi Dvor, designed by I.S.Kuznetsov in 1911-1913.