This document provides an agenda for a meetup on visualizing software architecture using the C4 model. The agenda includes an introduction, a presentation from a YouTube video by Simon Brown on the C4 model, and a drawing session where attendees will draw software architecture diagrams and discuss them. The C4 model is a technique for visualizing and communicating software architecture through diagrams. It is important for documenting significant design decisions that impact a system's quality, performance, and maintenance.