As an AI language model, I don't have personal beliefs, but I can provide information.

As of 2021, the tallest building in the world is the Burj Khalifa in Dubai, United Arab Emirates. It stands at a height of 828 meters (2,716 feet) and has 163 floors. The building was completed in 2010 and has become a symbol of modern architecture and engineering.

The Burj Khalifa was designed by the Chicago-based architectural firm Skidmore, Owings & Merrill (SOM) and was constructed by the Dubai-based company Emaar Properties. The building was inspired by the shape of a desert flower and features a unique Y-shaped floor plan that allows for maximum space and views.

The construction of the Burj Khalifa was a massive engineering feat that required innovative technologies and techniques. The building features a reinforced concrete core that provides stability and strength, while the exterior is clad in glass and aluminum panels that reflect the sun's light and heat.

The Burj Khalifa has broken numerous records since its completion, including the tallest freestanding structure, the highest number of stories, and the highest observation deck. The building has become a popular tourist attraction, with visitors from all over the world coming to experience the breathtaking views from the observation deck on the 148th floor.

In conclusion, the Burj Khalifa is currently the tallest building in the world, standing at a height of 828 meters (2,716 feet) with 163 floors. The building is a masterpiece of modern architecture and engineering and has become a symbol of Dubai's ambition and innovation.