  Art Gallery Localization (AGL) is the problem of placing a set $T$ of
broadcast towers in a simple polygon $P$ in order for a point to locate itself
in the interior. For any point $p \in P$: for each tower $t \in T \cap V(p)$
(where $V(p)$ denotes the visibility polygon of $p$) the point $p$ receives the
coordinates of $t$ and the Euclidean distance between $t$ and $p$. From this
information $p$ can determine its coordinates. We study the computational
complexity of AGL problem. We show that the problem of determining the minimum
number of broadcast towers that can localize a point anywhere in a simple
polygon $P$ is NP-hard. We show a reduction from Boolean Three Satisfiability
problem to our problem and give a proof that the reduction takes polynomial
time.
