> For the complete documentation index, see [llms.txt](https://elders-oss.gitbook.io/cronus/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://elders-oss.gitbook.io/cronus/readme.md).

# 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.


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