The Westerkerk anchors the Prinsengracht in Amsterdam's canal belt with a tower so tall it served for centuries as a fire-watch post for the whole city. Designed by Hendrick de Keyser and completed in 1631, it was, at the time, the largest Protestant church in the world. At its summit sits a blue imperial crown, studded with 750 glass balls representing pearls, each one marking a year of Amsterdam's age. The crown was a medieval seal of civic trustworthiness, repurposed here as a marketing device for a city that ran on trade.

Rembrandt died nearby, penniless, and was buried inside. His grave has since disappeared, though a commemoration stone remains. Anne Frank, hiding just metres away on the Prinsengracht, wrote that she could hear the Westerkerk's bells from the secret annexe.

VoiceMap's self-guided tours use the Westerkerk to trace Amsterdam's Golden Age, following Hendrick de Keyser's fingerprints across the canal belt and connecting the church's imperial symbolism to the merchant ambitions that shaped the city.