The Medallion architecture is a widely used data workflow that organizes data into three layers: Bronze, Silver, and Gold. The Bronze layer acts as an entry point for raw, unprocessed data, optimized for high-throughput ingestion using ClickHouse's flexible and performant constructs. It serves as a historical archive, preserving raw data for lineage, debugging, or reprocessing without requiring complete cleansing or deduplication upfront. The Silver layer transforms raw data from the Bronze layer into a more consistent and well-structured form, addressing data quality issues such as filtering out invalid rows, standardizing schemas, and performing transformations. The Gold layer represents the final stage in the Medallion architecture, where data is curated into fully denormalized, business-ready datasets optimized for consumption by end-user applications and analytics. With ClickHouse, each layer can be implemented using native constructs, eliminating the need for external frameworks or tooling, and providing a flexible and evolving approach to managing data pipelines through tiered transformations.