> For the complete documentation index, see [llms.txt](https://city-protocol.gitbook.io/docs/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://city-protocol.gitbook.io/docs/issuance-and-operation-layer.md).

# Issuance & Operation Layer

- [Overview](https://city-protocol.gitbook.io/docs/issuance-and-operation-layer/overview.md)
- [Two Architectures](https://city-protocol.gitbook.io/docs/issuance-and-operation-layer/overview/two-architectures.md)
- [Example Product Templates](https://city-protocol.gitbook.io/docs/issuance-and-operation-layer/overview/example-product-templates.md)
- [Curator-Vault Architecture](https://city-protocol.gitbook.io/docs/issuance-and-operation-layer/curator-vault-architecture.md)
- [Core Participants](https://city-protocol.gitbook.io/docs/issuance-and-operation-layer/curator-vault-architecture/core-participants.md)
- [Product Lifecycle](https://city-protocol.gitbook.io/docs/issuance-and-operation-layer/curator-vault-architecture/product-lifecycle.md)
- [Security and Risk Controls](https://city-protocol.gitbook.io/docs/issuance-and-operation-layer/curator-vault-architecture/security-and-risk-controls.md)
- [OTP Architecture](https://city-protocol.gitbook.io/docs/issuance-and-operation-layer/otp-architecture.md)
- [Core Participants](https://city-protocol.gitbook.io/docs/issuance-and-operation-layer/otp-architecture/core-participants.md)
- [Portfolio Lifecycle](https://city-protocol.gitbook.io/docs/issuance-and-operation-layer/otp-architecture/portfolio-lifecycle.md)
- [Security and Risk Controls](https://city-protocol.gitbook.io/docs/issuance-and-operation-layer/otp-architecture/security-and-risk-controls.md)
- [Products on the OTP Architecture](https://city-protocol.gitbook.io/docs/issuance-and-operation-layer/otp-architecture/products-on-the-otp-architecture.md)
- [Selecting an Architecture](https://city-protocol.gitbook.io/docs/issuance-and-operation-layer/selecting-an-architecture.md)