  Active Galactic Nuclei (AGN) are multiwavelength emitters. To have any hope
of understanding them, or even to determine their energy output, we must
observe them with many telescopes. I will review what we have learned from
broad-band observations of relatively bright, low-redshift AGN over the past 15
years. AGN can be found at all wavelengths but each provides a different view
of the intrinsic population, often with little overlap between samples selected
in different wavebands. I look forward to the full view of the intrinsic
population which we will obtain over the next few years with surveys using
today's new, sensitive observatories. These surveys are already finding enough
new and different AGN candidates to pose the question "What IS an AGN?".
