  In this paper we study graph burnings using methods of algebraic topology. We
prove that the time function of a burning is a graph map to a path graph.
Afterwards, we define a category whose objects are graph burnings and morphisms
are graph maps which commute with the time functions of the burnings. In this
category we study relations between burnings of different graphs and, in
particular, between burnings of a graph and its subgraphs. For every graph, we
define a simplicial complex, arising from the set of all the burnings, which we
call a configuration space of the burnings. Further, simplicial structure of
the configuration space gives burning homology of the graph. We describe
properties of the configuration space and the burning homology theory. In
particular, we prove that the one-dimensional skeleton of the configuration
space of a graph $G$ coincides with the complement graph of $G$. The results
are illustrated with numerous examples.
