The introduction of agile methods at scale entails unique concerns such as inter-team coordination, dependencies to other organizational units, or distribution of work without a defined architecture. Compared to the rich body of agile software development literature describing typical challenges and best practices, recurring concerns and patterns in large-scale agile development are not yet documented extensively. We aim to fill this gap by presenting a pattern language for large-scale agile software development as part of our larger research initiative in close collaboration with 10 companies. The structure and practical relevance of the proposed language were evaluated by 14 interviews. In this paper, we showcase our pattern language by presenting four patterns.