First sketch in Berlin

This is my first sketch in Berlin during The USk Germany Meeting 2023. It was sunny and windy late Friday morning and we sat by the river with my Polish friends, gathering from our trains and warming up before the festival opening. I decided to start simple and used just ink and water (and a little colored pencils for the flags).

Sketchbook: Koval Sketchbooks with Fabriano 5 HP paper
Ink: KWZ Ink „Warsaw Dreaming“ (suitable for fountain pens)
Pen: Hong Dian with fude nib