Principe de Vergara 43 is an eight-floor office building with ground floor retail in the heart of Madrid, Spain. This building has 118,000 square feet and 106 parking spaces.

It is located steps from the Plaza del Marqués de Salamanca in Madrid, Spain. The neighborhood is known as Barrio de Salamanca, the most exclusive and expensive area in Madrid. Barrio de Salamanca is a central location in the city and is home to the headquarters of several major banks and law firms. It also is the site of prominent high-end retail.

Principe de Vergara 43 was developed by an affiliate company of Key International.