For developers who prefer self-hosting or using a CDN, the Fontsource Marcellus page offers direct links to .woff2 files and NPM installation commands.
If you are looking to download or implement this typeface, the most reliable are found through official font repositories: wtqc font link
For LaTeX users, the Marcellus package provides support for pdfLaTeX, XeLaTeX, and LuaLaTeX. Key Characteristics of Marcellus Marcellus - Google Fonts For developers who prefer self-hosting or using a