# Cello Masterclass with Katie Tertell - **Date:** 2026-12-03T08:00:00+00:00 - **Venue:** Helikon Art, ул. „Граф Игнатиев" №6 - **District:** Център - **Category:** Workshop - **Source:** [Sofia Art Institute](https://sofiaartinstitute.com/event/maystorski-klas-po-violonchelo-s-katie-tertell/) ## About Sofia Art Institute presents a one-day cello masterclass with American cellist Katie Tertell, a performer with an international career, artistic curator and advocate for the development of chamber music.