# Introduction [Quick Start](/cronus/getting-started/quick-start.md) ## What is Cronus? Cronus is an open-source framework that helps you solve business problems with less time on infrastructure concerns. Applications built with Cronus are centred around three core concepts: * [Domain-Driven Design](/cronus/cronus-framework/concepts/ddd.md) * [Event Sourcing](/cronus/cronus-framework/concepts/es.md) * [Command Query Responsibility Segregation](/cronus/cronus-framework/concepts/cqrs.md) While many applications can be built using Cronus, it has proven very effective for microservices architectures. Cronus provides an innovative and powerful way of sensibly evolving to event-driven microservices within a microservice architecture. ### Once upon a time... Cronus has its roots way back in 2012 when a couple of passionate software engineers started building the infrastructure for a software project using DDD/CQRS/ES. The results were quite impressive and the team started growing. Everybody was sharing the same vision and passion for going beyond the boundaries of their skills. The amazing part of this story is that this hasn't changed. Cronus is a reflection of our philosophy for building great software solutions. --- # Agent Instructions: Querying This Documentation If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question. Perform an HTTP GET request on the current page URL with the `ask` query parameter: ``` GET https://elders-oss.gitbook.io/cronus/readme.md?ask= ``` The question should be specific, self-contained, and written in natural language. The response will contain a direct answer to the question and relevant excerpts and sources from the documentation. Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.