File:Brussels - Statue of Mayor Charles Buls and his dog (4258513172).jpg

Charles Buls or Karel Buls (13 October 1837–13 July 1914) was a Belgian politician and former mayor of the City of Brussels.

Charles François Gommaire Buls was born in Brussels as the son of a goldsmith from the region of Mechelen. Buls received an artistic education, and spent a year in Paris, and nine months in Italy, studying fine arts. He also learned several languages including English, German, and Latin. He followed in his father's footsteps and worked as a goldsmith.

In 1862 he became a Freemason in "Les vrais amis", and in 1871 joined "La libre pensée". At the same time, he was a member of "de Veldbloem" and "Vlamingen vooruit", two Flemish organisations of the Flemish movement. Together with his brother in law, Leo Van der Kindere, the later mayor of Uccle, he became a "flamingant".

Buls entered politics in 1870 as a Flemish candidate on a radical list but he was not elected until 1877, when he was elected to the Brussels city council on a liberal list. He became schepen or échevin of education in 1879. Buls was a supporter of progressive causes, especially in language issues and education, and the education of women, on which he wrote frequently. He was a supporter of Isabelle Gatti de Gamond's educational reforms. From 1879 on he played an important role in the development of Flemish education in Brussels.

On the national stage, Buls served in the Belgian Chamber of Representatives in 1882, and again from 1886 to 1894.

Buls became Mayor of Brussels in 1881 and remained in office until 1899. At his initiative policemen had to be able to speak both French and Dutch and bilingual signposting was established throughout the city. However, along with these reforms, his most lasting achievement was the result of his opposition to the grandiose architectural schemes of King Leopold II, and the resulting preservation of old parts of Brussels.

In particular, Buls was a steadfast defender and admirer of the Mont des Arts and the Grand Place, now a UNESCO World Heritage site, successfully proposing the 1883 city ordinance protecting the façades of the Grand Place buildings and providing funds for their restoration which took place between 1883 and 1923.

In 1899, the architects of Brussels who had been involved in this restoration work paid for a memorial commemorating Buls, designed by Victor Horta and executed by Victor Rousseau, to be placed in the rebuilt "L'Etoile" or "De Ster" house on the Grand-Place.

At the reopening of the restored Town Hall, Buls greeted Leopold II in Dutch, and the King replied in the same language, which was unusual at the time.

In 1999, a new fountain with a larger-than-life-sized seated statue of Buls and his dog was erected at the Place Agoraplein, close to the Grand Place.