  We show that the Levin-Wen model of a unitary fusion category $\mathcal{C}$
is a gauge theory with gauge symmetry given by the tube algebra
$\operatorname{Tube}(\mathcal{C})$. In particular, we define a model
corresponding to a $\operatorname{Tube}(\mathcal{C})$ symmetry protected
topological phase, and we provide a gauging procedure which results in the
corresponding Levin-Wen model. In the case
$\mathcal{C}=\mathsf{Hilb}(G,\omega)$, we show how our procedure reduces to the
twisted gauging of a trivial $G$-SPT to produce the Twisted Quantum Double. We
further provide an example which is outside the bounds of the current
literature, the trivial Fibonacci SPT, whose gauge theory results in the
doubled Fibonacci string-net. Our formalism has a natural topological
interpretation with string diagrams living on a punctured sphere. We provide
diagrams to supplement our mathematical proofs and to give the reader an
intuitive understanding of the subject matter.
